forked from luck/tmp_suning_uos_patched
a7fdd90bc4
This makes it possible to build kernels for PReP and/or CHRP with ARCH=ppc by removing the (non-building) powermac support. It's now also possible to select PReP and CHRP independently. Powermac users should now build with ARCH=powerpc instead of ARCH=ppc. (This does mean that it is no longer possible to build a 32-bit kernel for a G5.) Signed-off-by: Paul Mackerras <paulus@samba.org>
1430 lines
35 KiB
C
1430 lines
35 KiB
C
/*
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* Procedures for interfacing to the Open Firmware PROM on
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* Power Macintosh computers.
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*
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* In particular, we are interested in the device tree
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* and in using some of its services (exit, write to stdout).
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*
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* Paul Mackerras August 1996.
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* Copyright (C) 1996 Paul Mackerras.
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*/
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#include <stdarg.h>
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#include <linux/config.h>
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#include <linux/kernel.h>
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#include <linux/string.h>
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#include <linux/init.h>
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#include <linux/threads.h>
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#include <linux/spinlock.h>
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#include <linux/ioport.h>
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#include <linux/pci.h>
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#include <linux/slab.h>
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#include <linux/bitops.h>
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#include <asm/sections.h>
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#include <asm/prom.h>
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#include <asm/page.h>
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#include <asm/processor.h>
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#include <asm/irq.h>
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#include <asm/io.h>
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#include <asm/smp.h>
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#include <asm/bootx.h>
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#include <asm/system.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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#include <asm/bootinfo.h>
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#include <asm/btext.h>
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#include <asm/pci-bridge.h>
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#include <asm/open_pic.h>
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struct pci_address {
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unsigned a_hi;
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unsigned a_mid;
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unsigned a_lo;
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};
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struct pci_reg_property {
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struct pci_address addr;
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unsigned size_hi;
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unsigned size_lo;
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};
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struct isa_reg_property {
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unsigned space;
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unsigned address;
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unsigned size;
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};
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typedef unsigned long interpret_func(struct device_node *, unsigned long,
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int, int);
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static interpret_func interpret_pci_props;
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static interpret_func interpret_dbdma_props;
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static interpret_func interpret_isa_props;
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static interpret_func interpret_macio_props;
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static interpret_func interpret_root_props;
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extern char *klimit;
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/* Set for a newworld or CHRP machine */
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int use_of_interrupt_tree;
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struct device_node *dflt_interrupt_controller;
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int num_interrupt_controllers;
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extern unsigned int rtas_entry; /* physical pointer */
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extern struct device_node *allnodes;
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static unsigned long finish_node(struct device_node *, unsigned long,
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interpret_func *, int, int);
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static unsigned long finish_node_interrupts(struct device_node *, unsigned long);
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static struct device_node *find_phandle(phandle);
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extern void enter_rtas(void *);
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void phys_call_rtas(int, int, int, ...);
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extern char cmd_line[512]; /* XXX */
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extern boot_infos_t *boot_infos;
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unsigned long dev_tree_size;
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void
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phys_call_rtas(int service, int nargs, int nret, ...)
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{
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va_list list;
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union {
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unsigned long words[16];
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double align;
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} u;
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void (*rtas)(void *, unsigned long);
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int i;
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u.words[0] = service;
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u.words[1] = nargs;
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u.words[2] = nret;
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va_start(list, nret);
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for (i = 0; i < nargs; ++i)
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u.words[i+3] = va_arg(list, unsigned long);
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va_end(list);
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rtas = (void (*)(void *, unsigned long)) rtas_entry;
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rtas(&u, rtas_data);
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}
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/*
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* finish_device_tree is called once things are running normally
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* (i.e. with text and data mapped to the address they were linked at).
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* It traverses the device tree and fills in the name, type,
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* {n_}addrs and {n_}intrs fields of each node.
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*/
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void __init
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finish_device_tree(void)
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{
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unsigned long mem = (unsigned long) klimit;
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struct device_node *np;
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/* All CHRPs now use the interrupt tree */
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for (np = allnodes; np != NULL; np = np->allnext) {
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if (get_property(np, "interrupt-parent", NULL)) {
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use_of_interrupt_tree = 1;
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break;
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}
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}
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if (use_of_interrupt_tree) {
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/*
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* We want to find out here how many interrupt-controller
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* nodes there are, and if we are booted from BootX,
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* we need a pointer to the first (and hopefully only)
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* such node. But we can't use find_devices here since
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* np->name has not been set yet. -- paulus
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*/
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int n = 0;
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char *name, *ic;
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int iclen;
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for (np = allnodes; np != NULL; np = np->allnext) {
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ic = get_property(np, "interrupt-controller", &iclen);
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name = get_property(np, "name", NULL);
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/* checking iclen makes sure we don't get a false
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match on /chosen.interrupt_controller */
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if ((name != NULL
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&& strcmp(name, "interrupt-controller") == 0)
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|| (ic != NULL && iclen == 0 && strcmp(name, "AppleKiwi"))) {
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if (n == 0)
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dflt_interrupt_controller = np;
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++n;
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}
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}
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num_interrupt_controllers = n;
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}
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mem = finish_node(allnodes, mem, NULL, 1, 1);
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dev_tree_size = mem - (unsigned long) allnodes;
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klimit = (char *) mem;
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}
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static unsigned long __init
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finish_node(struct device_node *np, unsigned long mem_start,
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interpret_func *ifunc, int naddrc, int nsizec)
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{
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struct device_node *child;
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int *ip;
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np->name = get_property(np, "name", NULL);
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np->type = get_property(np, "device_type", NULL);
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if (!np->name)
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np->name = "<NULL>";
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if (!np->type)
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np->type = "<NULL>";
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/* get the device addresses and interrupts */
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if (ifunc != NULL)
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mem_start = ifunc(np, mem_start, naddrc, nsizec);
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if (use_of_interrupt_tree)
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mem_start = finish_node_interrupts(np, mem_start);
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/* Look for #address-cells and #size-cells properties. */
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ip = (int *) get_property(np, "#address-cells", NULL);
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if (ip != NULL)
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naddrc = *ip;
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ip = (int *) get_property(np, "#size-cells", NULL);
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if (ip != NULL)
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nsizec = *ip;
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if (np->parent == NULL)
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ifunc = interpret_root_props;
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else if (np->type == 0)
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ifunc = NULL;
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else if (!strcmp(np->type, "pci") || !strcmp(np->type, "vci"))
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ifunc = interpret_pci_props;
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else if (!strcmp(np->type, "dbdma"))
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ifunc = interpret_dbdma_props;
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else if (!strcmp(np->type, "mac-io")
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|| ifunc == interpret_macio_props)
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ifunc = interpret_macio_props;
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else if (!strcmp(np->type, "isa"))
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ifunc = interpret_isa_props;
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else if (!strcmp(np->name, "uni-n") || !strcmp(np->name, "u3"))
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ifunc = interpret_root_props;
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else if (!((ifunc == interpret_dbdma_props
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|| ifunc == interpret_macio_props)
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&& (!strcmp(np->type, "escc")
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|| !strcmp(np->type, "media-bay"))))
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ifunc = NULL;
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/* if we were booted from BootX, convert the full name */
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if (boot_infos
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&& strncmp(np->full_name, "Devices:device-tree", 19) == 0) {
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if (np->full_name[19] == 0) {
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strcpy(np->full_name, "/");
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} else if (np->full_name[19] == ':') {
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char *p = np->full_name + 19;
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np->full_name = p;
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for (; *p; ++p)
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if (*p == ':')
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*p = '/';
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}
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}
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for (child = np->child; child != NULL; child = child->sibling)
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mem_start = finish_node(child, mem_start, ifunc,
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naddrc, nsizec);
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return mem_start;
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}
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/*
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* Find the interrupt parent of a node.
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*/
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static struct device_node * __init
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intr_parent(struct device_node *p)
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{
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phandle *parp;
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parp = (phandle *) get_property(p, "interrupt-parent", NULL);
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if (parp == NULL)
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return p->parent;
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p = find_phandle(*parp);
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if (p != NULL)
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return p;
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/*
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* On a powermac booted with BootX, we don't get to know the
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* phandles for any nodes, so find_phandle will return NULL.
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* Fortunately these machines only have one interrupt controller
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* so there isn't in fact any ambiguity. -- paulus
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*/
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if (num_interrupt_controllers == 1)
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p = dflt_interrupt_controller;
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return p;
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}
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/*
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* Find out the size of each entry of the interrupts property
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* for a node.
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*/
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static int __init
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prom_n_intr_cells(struct device_node *np)
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{
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struct device_node *p;
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unsigned int *icp;
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for (p = np; (p = intr_parent(p)) != NULL; ) {
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icp = (unsigned int *)
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get_property(p, "#interrupt-cells", NULL);
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if (icp != NULL)
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return *icp;
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if (get_property(p, "interrupt-controller", NULL) != NULL
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|| get_property(p, "interrupt-map", NULL) != NULL) {
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printk("oops, node %s doesn't have #interrupt-cells\n",
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p->full_name);
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return 1;
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}
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}
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printk("prom_n_intr_cells failed for %s\n", np->full_name);
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return 1;
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}
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/*
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* Map an interrupt from a device up to the platform interrupt
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* descriptor.
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*/
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static int __init
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map_interrupt(unsigned int **irq, struct device_node **ictrler,
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struct device_node *np, unsigned int *ints, int nintrc)
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{
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struct device_node *p, *ipar;
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unsigned int *imap, *imask, *ip;
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int i, imaplen, match;
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int newintrc = 1, newaddrc = 1;
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unsigned int *reg;
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int naddrc;
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reg = (unsigned int *) get_property(np, "reg", NULL);
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naddrc = prom_n_addr_cells(np);
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p = intr_parent(np);
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while (p != NULL) {
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if (get_property(p, "interrupt-controller", NULL) != NULL)
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/* this node is an interrupt controller, stop here */
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break;
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imap = (unsigned int *)
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get_property(p, "interrupt-map", &imaplen);
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if (imap == NULL) {
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p = intr_parent(p);
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continue;
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}
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imask = (unsigned int *)
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get_property(p, "interrupt-map-mask", NULL);
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if (imask == NULL) {
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printk("oops, %s has interrupt-map but no mask\n",
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p->full_name);
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return 0;
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}
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imaplen /= sizeof(unsigned int);
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match = 0;
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ipar = NULL;
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while (imaplen > 0 && !match) {
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/* check the child-interrupt field */
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match = 1;
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for (i = 0; i < naddrc && match; ++i)
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match = ((reg[i] ^ imap[i]) & imask[i]) == 0;
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for (; i < naddrc + nintrc && match; ++i)
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match = ((ints[i-naddrc] ^ imap[i]) & imask[i]) == 0;
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imap += naddrc + nintrc;
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imaplen -= naddrc + nintrc;
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/* grab the interrupt parent */
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ipar = find_phandle((phandle) *imap++);
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--imaplen;
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if (ipar == NULL && num_interrupt_controllers == 1)
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/* cope with BootX not giving us phandles */
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ipar = dflt_interrupt_controller;
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if (ipar == NULL) {
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printk("oops, no int parent %x in map of %s\n",
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imap[-1], p->full_name);
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return 0;
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}
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/* find the parent's # addr and intr cells */
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ip = (unsigned int *)
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get_property(ipar, "#interrupt-cells", NULL);
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if (ip == NULL) {
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printk("oops, no #interrupt-cells on %s\n",
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ipar->full_name);
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return 0;
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}
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newintrc = *ip;
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ip = (unsigned int *)
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get_property(ipar, "#address-cells", NULL);
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newaddrc = (ip == NULL)? 0: *ip;
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imap += newaddrc + newintrc;
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imaplen -= newaddrc + newintrc;
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}
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if (imaplen < 0) {
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printk("oops, error decoding int-map on %s, len=%d\n",
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p->full_name, imaplen);
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return 0;
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}
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if (!match) {
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printk("oops, no match in %s int-map for %s\n",
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p->full_name, np->full_name);
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return 0;
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}
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p = ipar;
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naddrc = newaddrc;
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nintrc = newintrc;
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ints = imap - nintrc;
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reg = ints - naddrc;
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}
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if (p == NULL)
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printk("hmmm, int tree for %s doesn't have ctrler\n",
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np->full_name);
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*irq = ints;
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*ictrler = p;
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return nintrc;
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}
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/*
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* New version of finish_node_interrupts.
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*/
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static unsigned long __init
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finish_node_interrupts(struct device_node *np, unsigned long mem_start)
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{
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unsigned int *ints;
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int intlen, intrcells;
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int i, j, n, offset;
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unsigned int *irq;
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struct device_node *ic;
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ints = (unsigned int *) get_property(np, "interrupts", &intlen);
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if (ints == NULL)
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return mem_start;
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intrcells = prom_n_intr_cells(np);
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intlen /= intrcells * sizeof(unsigned int);
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np->n_intrs = intlen;
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np->intrs = (struct interrupt_info *) mem_start;
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mem_start += intlen * sizeof(struct interrupt_info);
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for (i = 0; i < intlen; ++i) {
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np->intrs[i].line = 0;
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np->intrs[i].sense = 1;
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n = map_interrupt(&irq, &ic, np, ints, intrcells);
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if (n <= 0)
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continue;
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offset = 0;
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/*
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* On a CHRP we have an 8259 which is subordinate to
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* the openpic in the interrupt tree, but we want the
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* openpic's interrupt numbers offsetted, not the 8259's.
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* So we apply the offset if the controller is at the
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* root of the interrupt tree, i.e. has no interrupt-parent.
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* This doesn't cope with the general case of multiple
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* cascaded interrupt controllers, but then neither will
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* irq.c at the moment either. -- paulus
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* The G5 triggers that code, I add a machine test. On
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* those machines, we want to offset interrupts from the
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* second openpic by 128 -- BenH
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*/
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if (num_interrupt_controllers > 1
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&& ic != NULL
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&& get_property(ic, "interrupt-parent", NULL) == NULL)
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offset = 16;
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np->intrs[i].line = irq[0] + offset;
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if (n > 1)
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np->intrs[i].sense = irq[1];
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if (n > 2) {
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printk("hmmm, got %d intr cells for %s:", n,
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np->full_name);
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for (j = 0; j < n; ++j)
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printk(" %d", irq[j]);
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printk("\n");
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}
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ints += intrcells;
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}
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return mem_start;
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}
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|
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/*
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* When BootX makes a copy of the device tree from the MacOS
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* Name Registry, it is in the format we use but all of the pointers
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* are offsets from the start of the tree.
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* This procedure updates the pointers.
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*/
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void __init
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relocate_nodes(void)
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{
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unsigned long base;
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struct device_node *np;
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struct property *pp;
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#define ADDBASE(x) (x = (typeof (x))((x)? ((unsigned long)(x) + base): 0))
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base = (unsigned long) boot_infos + boot_infos->deviceTreeOffset;
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allnodes = (struct device_node *)(base + 4);
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for (np = allnodes; np != 0; np = np->allnext) {
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ADDBASE(np->full_name);
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ADDBASE(np->properties);
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ADDBASE(np->parent);
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ADDBASE(np->child);
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ADDBASE(np->sibling);
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ADDBASE(np->allnext);
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for (pp = np->properties; pp != 0; pp = pp->next) {
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ADDBASE(pp->name);
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ADDBASE(pp->value);
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ADDBASE(pp->next);
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}
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}
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}
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|
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int
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prom_n_addr_cells(struct device_node* np)
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{
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int* ip;
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do {
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if (np->parent)
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np = np->parent;
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ip = (int *) get_property(np, "#address-cells", NULL);
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if (ip != NULL)
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return *ip;
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} while (np->parent);
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/* No #address-cells property for the root node, default to 1 */
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return 1;
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}
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|
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int
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prom_n_size_cells(struct device_node* np)
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{
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int* ip;
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do {
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if (np->parent)
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np = np->parent;
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ip = (int *) get_property(np, "#size-cells", NULL);
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if (ip != NULL)
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return *ip;
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} while (np->parent);
|
|
/* No #size-cells property for the root node, default to 1 */
|
|
return 1;
|
|
}
|
|
|
|
static unsigned long __init
|
|
map_addr(struct device_node *np, unsigned long space, unsigned long addr)
|
|
{
|
|
int na;
|
|
unsigned int *ranges;
|
|
int rlen = 0;
|
|
unsigned int type;
|
|
|
|
type = (space >> 24) & 3;
|
|
if (type == 0)
|
|
return addr;
|
|
|
|
while ((np = np->parent) != NULL) {
|
|
if (strcmp(np->type, "pci") != 0)
|
|
continue;
|
|
/* PCI bridge: map the address through the ranges property */
|
|
na = prom_n_addr_cells(np);
|
|
ranges = (unsigned int *) get_property(np, "ranges", &rlen);
|
|
while ((rlen -= (na + 5) * sizeof(unsigned int)) >= 0) {
|
|
if (((ranges[0] >> 24) & 3) == type
|
|
&& ranges[2] <= addr
|
|
&& addr - ranges[2] < ranges[na+4]) {
|
|
/* ok, this matches, translate it */
|
|
addr += ranges[na+2] - ranges[2];
|
|
break;
|
|
}
|
|
ranges += na + 5;
|
|
}
|
|
}
|
|
return addr;
|
|
}
|
|
|
|
static unsigned long __init
|
|
interpret_pci_props(struct device_node *np, unsigned long mem_start,
|
|
int naddrc, int nsizec)
|
|
{
|
|
struct address_range *adr;
|
|
struct pci_reg_property *pci_addrs;
|
|
int i, l, *ip;
|
|
|
|
pci_addrs = (struct pci_reg_property *)
|
|
get_property(np, "assigned-addresses", &l);
|
|
if (pci_addrs != 0 && l >= sizeof(struct pci_reg_property)) {
|
|
i = 0;
|
|
adr = (struct address_range *) mem_start;
|
|
while ((l -= sizeof(struct pci_reg_property)) >= 0) {
|
|
adr[i].space = pci_addrs[i].addr.a_hi;
|
|
adr[i].address = map_addr(np, pci_addrs[i].addr.a_hi,
|
|
pci_addrs[i].addr.a_lo);
|
|
adr[i].size = pci_addrs[i].size_lo;
|
|
++i;
|
|
}
|
|
np->addrs = adr;
|
|
np->n_addrs = i;
|
|
mem_start += i * sizeof(struct address_range);
|
|
}
|
|
|
|
if (use_of_interrupt_tree)
|
|
return mem_start;
|
|
|
|
ip = (int *) get_property(np, "AAPL,interrupts", &l);
|
|
if (ip == 0 && np->parent)
|
|
ip = (int *) get_property(np->parent, "AAPL,interrupts", &l);
|
|
if (ip == 0)
|
|
ip = (int *) get_property(np, "interrupts", &l);
|
|
if (ip != 0) {
|
|
np->intrs = (struct interrupt_info *) mem_start;
|
|
np->n_intrs = l / sizeof(int);
|
|
mem_start += np->n_intrs * sizeof(struct interrupt_info);
|
|
for (i = 0; i < np->n_intrs; ++i) {
|
|
np->intrs[i].line = *ip++;
|
|
np->intrs[i].sense = 1;
|
|
}
|
|
}
|
|
|
|
return mem_start;
|
|
}
|
|
|
|
static unsigned long __init
|
|
interpret_dbdma_props(struct device_node *np, unsigned long mem_start,
|
|
int naddrc, int nsizec)
|
|
{
|
|
struct reg_property *rp;
|
|
struct address_range *adr;
|
|
unsigned long base_address;
|
|
int i, l, *ip;
|
|
struct device_node *db;
|
|
|
|
base_address = 0;
|
|
for (db = np->parent; db != NULL; db = db->parent) {
|
|
if (!strcmp(db->type, "dbdma") && db->n_addrs != 0) {
|
|
base_address = db->addrs[0].address;
|
|
break;
|
|
}
|
|
}
|
|
|
|
rp = (struct reg_property *) get_property(np, "reg", &l);
|
|
if (rp != 0 && l >= sizeof(struct reg_property)) {
|
|
i = 0;
|
|
adr = (struct address_range *) mem_start;
|
|
while ((l -= sizeof(struct reg_property)) >= 0) {
|
|
adr[i].space = 2;
|
|
adr[i].address = rp[i].address + base_address;
|
|
adr[i].size = rp[i].size;
|
|
++i;
|
|
}
|
|
np->addrs = adr;
|
|
np->n_addrs = i;
|
|
mem_start += i * sizeof(struct address_range);
|
|
}
|
|
|
|
if (use_of_interrupt_tree)
|
|
return mem_start;
|
|
|
|
ip = (int *) get_property(np, "AAPL,interrupts", &l);
|
|
if (ip == 0)
|
|
ip = (int *) get_property(np, "interrupts", &l);
|
|
if (ip != 0) {
|
|
np->intrs = (struct interrupt_info *) mem_start;
|
|
np->n_intrs = l / sizeof(int);
|
|
mem_start += np->n_intrs * sizeof(struct interrupt_info);
|
|
for (i = 0; i < np->n_intrs; ++i) {
|
|
np->intrs[i].line = *ip++;
|
|
np->intrs[i].sense = 1;
|
|
}
|
|
}
|
|
|
|
return mem_start;
|
|
}
|
|
|
|
static unsigned long __init
|
|
interpret_macio_props(struct device_node *np, unsigned long mem_start,
|
|
int naddrc, int nsizec)
|
|
{
|
|
struct reg_property *rp;
|
|
struct address_range *adr;
|
|
unsigned long base_address;
|
|
int i, l, *ip;
|
|
struct device_node *db;
|
|
|
|
base_address = 0;
|
|
for (db = np->parent; db != NULL; db = db->parent) {
|
|
if (!strcmp(db->type, "mac-io") && db->n_addrs != 0) {
|
|
base_address = db->addrs[0].address;
|
|
break;
|
|
}
|
|
}
|
|
|
|
rp = (struct reg_property *) get_property(np, "reg", &l);
|
|
if (rp != 0 && l >= sizeof(struct reg_property)) {
|
|
i = 0;
|
|
adr = (struct address_range *) mem_start;
|
|
while ((l -= sizeof(struct reg_property)) >= 0) {
|
|
adr[i].space = 2;
|
|
adr[i].address = rp[i].address + base_address;
|
|
adr[i].size = rp[i].size;
|
|
++i;
|
|
}
|
|
np->addrs = adr;
|
|
np->n_addrs = i;
|
|
mem_start += i * sizeof(struct address_range);
|
|
}
|
|
|
|
if (use_of_interrupt_tree)
|
|
return mem_start;
|
|
|
|
ip = (int *) get_property(np, "interrupts", &l);
|
|
if (ip == 0)
|
|
ip = (int *) get_property(np, "AAPL,interrupts", &l);
|
|
if (ip != 0) {
|
|
np->intrs = (struct interrupt_info *) mem_start;
|
|
np->n_intrs = l / sizeof(int);
|
|
for (i = 0; i < np->n_intrs; ++i) {
|
|
np->intrs[i].line = *ip++;
|
|
np->intrs[i].sense = 1;
|
|
}
|
|
mem_start += np->n_intrs * sizeof(struct interrupt_info);
|
|
}
|
|
|
|
return mem_start;
|
|
}
|
|
|
|
static unsigned long __init
|
|
interpret_isa_props(struct device_node *np, unsigned long mem_start,
|
|
int naddrc, int nsizec)
|
|
{
|
|
struct isa_reg_property *rp;
|
|
struct address_range *adr;
|
|
int i, l, *ip;
|
|
|
|
rp = (struct isa_reg_property *) get_property(np, "reg", &l);
|
|
if (rp != 0 && l >= sizeof(struct isa_reg_property)) {
|
|
i = 0;
|
|
adr = (struct address_range *) mem_start;
|
|
while ((l -= sizeof(struct reg_property)) >= 0) {
|
|
adr[i].space = rp[i].space;
|
|
adr[i].address = rp[i].address
|
|
+ (adr[i].space? 0: _ISA_MEM_BASE);
|
|
adr[i].size = rp[i].size;
|
|
++i;
|
|
}
|
|
np->addrs = adr;
|
|
np->n_addrs = i;
|
|
mem_start += i * sizeof(struct address_range);
|
|
}
|
|
|
|
if (use_of_interrupt_tree)
|
|
return mem_start;
|
|
|
|
ip = (int *) get_property(np, "interrupts", &l);
|
|
if (ip != 0) {
|
|
np->intrs = (struct interrupt_info *) mem_start;
|
|
np->n_intrs = l / (2 * sizeof(int));
|
|
mem_start += np->n_intrs * sizeof(struct interrupt_info);
|
|
for (i = 0; i < np->n_intrs; ++i) {
|
|
np->intrs[i].line = *ip++;
|
|
np->intrs[i].sense = *ip++;
|
|
}
|
|
}
|
|
|
|
return mem_start;
|
|
}
|
|
|
|
static unsigned long __init
|
|
interpret_root_props(struct device_node *np, unsigned long mem_start,
|
|
int naddrc, int nsizec)
|
|
{
|
|
struct address_range *adr;
|
|
int i, l, *ip;
|
|
unsigned int *rp;
|
|
int rpsize = (naddrc + nsizec) * sizeof(unsigned int);
|
|
|
|
rp = (unsigned int *) get_property(np, "reg", &l);
|
|
if (rp != 0 && l >= rpsize) {
|
|
i = 0;
|
|
adr = (struct address_range *) mem_start;
|
|
while ((l -= rpsize) >= 0) {
|
|
adr[i].space = (naddrc >= 2? rp[naddrc-2]: 2);
|
|
adr[i].address = rp[naddrc - 1];
|
|
adr[i].size = rp[naddrc + nsizec - 1];
|
|
++i;
|
|
rp += naddrc + nsizec;
|
|
}
|
|
np->addrs = adr;
|
|
np->n_addrs = i;
|
|
mem_start += i * sizeof(struct address_range);
|
|
}
|
|
|
|
if (use_of_interrupt_tree)
|
|
return mem_start;
|
|
|
|
ip = (int *) get_property(np, "AAPL,interrupts", &l);
|
|
if (ip == 0)
|
|
ip = (int *) get_property(np, "interrupts", &l);
|
|
if (ip != 0) {
|
|
np->intrs = (struct interrupt_info *) mem_start;
|
|
np->n_intrs = l / sizeof(int);
|
|
mem_start += np->n_intrs * sizeof(struct interrupt_info);
|
|
for (i = 0; i < np->n_intrs; ++i) {
|
|
np->intrs[i].line = *ip++;
|
|
np->intrs[i].sense = 1;
|
|
}
|
|
}
|
|
|
|
return mem_start;
|
|
}
|
|
|
|
/*
|
|
* Work out the sense (active-low level / active-high edge)
|
|
* of each interrupt from the device tree.
|
|
*/
|
|
void __init
|
|
prom_get_irq_senses(unsigned char *senses, int off, int max)
|
|
{
|
|
struct device_node *np;
|
|
int i, j;
|
|
|
|
/* default to level-triggered */
|
|
memset(senses, 1, max - off);
|
|
if (!use_of_interrupt_tree)
|
|
return;
|
|
|
|
for (np = allnodes; np != 0; np = np->allnext) {
|
|
for (j = 0; j < np->n_intrs; j++) {
|
|
i = np->intrs[j].line;
|
|
if (i >= off && i < max) {
|
|
if (np->intrs[j].sense == 1)
|
|
senses[i-off] = (IRQ_SENSE_LEVEL
|
|
| IRQ_POLARITY_NEGATIVE);
|
|
else
|
|
senses[i-off] = (IRQ_SENSE_EDGE
|
|
| IRQ_POLARITY_POSITIVE);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Construct and return a list of the device_nodes with a given name.
|
|
*/
|
|
struct device_node *
|
|
find_devices(const char *name)
|
|
{
|
|
struct device_node *head, **prevp, *np;
|
|
|
|
prevp = &head;
|
|
for (np = allnodes; np != 0; np = np->allnext) {
|
|
if (np->name != 0 && strcasecmp(np->name, name) == 0) {
|
|
*prevp = np;
|
|
prevp = &np->next;
|
|
}
|
|
}
|
|
*prevp = NULL;
|
|
return head;
|
|
}
|
|
|
|
/*
|
|
* Construct and return a list of the device_nodes with a given type.
|
|
*/
|
|
struct device_node *
|
|
find_type_devices(const char *type)
|
|
{
|
|
struct device_node *head, **prevp, *np;
|
|
|
|
prevp = &head;
|
|
for (np = allnodes; np != 0; np = np->allnext) {
|
|
if (np->type != 0 && strcasecmp(np->type, type) == 0) {
|
|
*prevp = np;
|
|
prevp = &np->next;
|
|
}
|
|
}
|
|
*prevp = NULL;
|
|
return head;
|
|
}
|
|
|
|
/*
|
|
* Returns all nodes linked together
|
|
*/
|
|
struct device_node *
|
|
find_all_nodes(void)
|
|
{
|
|
struct device_node *head, **prevp, *np;
|
|
|
|
prevp = &head;
|
|
for (np = allnodes; np != 0; np = np->allnext) {
|
|
*prevp = np;
|
|
prevp = &np->next;
|
|
}
|
|
*prevp = NULL;
|
|
return head;
|
|
}
|
|
|
|
/* Checks if the given "compat" string matches one of the strings in
|
|
* the device's "compatible" property
|
|
*/
|
|
int
|
|
device_is_compatible(struct device_node *device, const char *compat)
|
|
{
|
|
const char* cp;
|
|
int cplen, l;
|
|
|
|
cp = (char *) get_property(device, "compatible", &cplen);
|
|
if (cp == NULL)
|
|
return 0;
|
|
while (cplen > 0) {
|
|
if (strncasecmp(cp, compat, strlen(compat)) == 0)
|
|
return 1;
|
|
l = strlen(cp) + 1;
|
|
cp += l;
|
|
cplen -= l;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
* Indicates whether the root node has a given value in its
|
|
* compatible property.
|
|
*/
|
|
int
|
|
machine_is_compatible(const char *compat)
|
|
{
|
|
struct device_node *root;
|
|
|
|
root = find_path_device("/");
|
|
if (root == 0)
|
|
return 0;
|
|
return device_is_compatible(root, compat);
|
|
}
|
|
|
|
/*
|
|
* Construct and return a list of the device_nodes with a given type
|
|
* and compatible property.
|
|
*/
|
|
struct device_node *
|
|
find_compatible_devices(const char *type, const char *compat)
|
|
{
|
|
struct device_node *head, **prevp, *np;
|
|
|
|
prevp = &head;
|
|
for (np = allnodes; np != 0; np = np->allnext) {
|
|
if (type != NULL
|
|
&& !(np->type != 0 && strcasecmp(np->type, type) == 0))
|
|
continue;
|
|
if (device_is_compatible(np, compat)) {
|
|
*prevp = np;
|
|
prevp = &np->next;
|
|
}
|
|
}
|
|
*prevp = NULL;
|
|
return head;
|
|
}
|
|
|
|
/*
|
|
* Find the device_node with a given full_name.
|
|
*/
|
|
struct device_node *
|
|
find_path_device(const char *path)
|
|
{
|
|
struct device_node *np;
|
|
|
|
for (np = allnodes; np != 0; np = np->allnext)
|
|
if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0)
|
|
return np;
|
|
return NULL;
|
|
}
|
|
|
|
/*******
|
|
*
|
|
* New implementation of the OF "find" APIs, return a refcounted
|
|
* object, call of_node_put() when done. Currently, still lacks
|
|
* locking as old implementation, this is beeing done for ppc64.
|
|
*
|
|
* Note that property management will need some locking as well,
|
|
* this isn't dealt with yet
|
|
*
|
|
*******/
|
|
|
|
/**
|
|
* of_find_node_by_name - Find a node by it's "name" property
|
|
* @from: The node to start searching from or NULL, the node
|
|
* you pass will not be searched, only the next one
|
|
* will; typically, you pass what the previous call
|
|
* returned. of_node_put() will be called on it
|
|
* @name: The name string to match against
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_find_node_by_name(struct device_node *from,
|
|
const char *name)
|
|
{
|
|
struct device_node *np = from ? from->allnext : allnodes;
|
|
|
|
for (; np != 0; np = np->allnext)
|
|
if (np->name != 0 && strcasecmp(np->name, name) == 0)
|
|
break;
|
|
if (from)
|
|
of_node_put(from);
|
|
return of_node_get(np);
|
|
}
|
|
|
|
/**
|
|
* of_find_node_by_type - Find a node by it's "device_type" property
|
|
* @from: The node to start searching from or NULL, the node
|
|
* you pass will not be searched, only the next one
|
|
* will; typically, you pass what the previous call
|
|
* returned. of_node_put() will be called on it
|
|
* @name: The type string to match against
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_find_node_by_type(struct device_node *from,
|
|
const char *type)
|
|
{
|
|
struct device_node *np = from ? from->allnext : allnodes;
|
|
|
|
for (; np != 0; np = np->allnext)
|
|
if (np->type != 0 && strcasecmp(np->type, type) == 0)
|
|
break;
|
|
if (from)
|
|
of_node_put(from);
|
|
return of_node_get(np);
|
|
}
|
|
|
|
/**
|
|
* of_find_compatible_node - Find a node based on type and one of the
|
|
* tokens in it's "compatible" property
|
|
* @from: The node to start searching from or NULL, the node
|
|
* you pass will not be searched, only the next one
|
|
* will; typically, you pass what the previous call
|
|
* returned. of_node_put() will be called on it
|
|
* @type: The type string to match "device_type" or NULL to ignore
|
|
* @compatible: The string to match to one of the tokens in the device
|
|
* "compatible" list.
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_find_compatible_node(struct device_node *from,
|
|
const char *type, const char *compatible)
|
|
{
|
|
struct device_node *np = from ? from->allnext : allnodes;
|
|
|
|
for (; np != 0; np = np->allnext) {
|
|
if (type != NULL
|
|
&& !(np->type != 0 && strcasecmp(np->type, type) == 0))
|
|
continue;
|
|
if (device_is_compatible(np, compatible))
|
|
break;
|
|
}
|
|
if (from)
|
|
of_node_put(from);
|
|
return of_node_get(np);
|
|
}
|
|
|
|
/**
|
|
* of_find_node_by_path - Find a node matching a full OF path
|
|
* @path: The full path to match
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_find_node_by_path(const char *path)
|
|
{
|
|
struct device_node *np = allnodes;
|
|
|
|
for (; np != 0; np = np->allnext)
|
|
if (np->full_name != 0 && strcasecmp(np->full_name, path) == 0)
|
|
break;
|
|
return of_node_get(np);
|
|
}
|
|
|
|
/**
|
|
* of_find_all_nodes - Get next node in global list
|
|
* @prev: Previous node or NULL to start iteration
|
|
* of_node_put() will be called on it
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_find_all_nodes(struct device_node *prev)
|
|
{
|
|
return of_node_get(prev ? prev->allnext : allnodes);
|
|
}
|
|
|
|
/**
|
|
* of_get_parent - Get a node's parent if any
|
|
* @node: Node to get parent
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_get_parent(const struct device_node *node)
|
|
{
|
|
return node ? of_node_get(node->parent) : NULL;
|
|
}
|
|
|
|
/**
|
|
* of_get_next_child - Iterate a node childs
|
|
* @node: parent node
|
|
* @prev: previous child of the parent node, or NULL to get first
|
|
*
|
|
* Returns a node pointer with refcount incremented, use
|
|
* of_node_put() on it when done.
|
|
*/
|
|
struct device_node *of_get_next_child(const struct device_node *node,
|
|
struct device_node *prev)
|
|
{
|
|
struct device_node *next = prev ? prev->sibling : node->child;
|
|
|
|
for (; next != 0; next = next->sibling)
|
|
if (of_node_get(next))
|
|
break;
|
|
if (prev)
|
|
of_node_put(prev);
|
|
return next;
|
|
}
|
|
|
|
/**
|
|
* of_node_get - Increment refcount of a node
|
|
* @node: Node to inc refcount, NULL is supported to
|
|
* simplify writing of callers
|
|
*
|
|
* Returns the node itself or NULL if gone. Current implementation
|
|
* does nothing as we don't yet do dynamic node allocation on ppc32
|
|
*/
|
|
struct device_node *of_node_get(struct device_node *node)
|
|
{
|
|
return node;
|
|
}
|
|
|
|
/**
|
|
* of_node_put - Decrement refcount of a node
|
|
* @node: Node to dec refcount, NULL is supported to
|
|
* simplify writing of callers
|
|
*
|
|
* Current implementation does nothing as we don't yet do dynamic node
|
|
* allocation on ppc32
|
|
*/
|
|
void of_node_put(struct device_node *node)
|
|
{
|
|
}
|
|
|
|
/*
|
|
* Find the device_node with a given phandle.
|
|
*/
|
|
static struct device_node * __init
|
|
find_phandle(phandle ph)
|
|
{
|
|
struct device_node *np;
|
|
|
|
for (np = allnodes; np != 0; np = np->allnext)
|
|
if (np->node == ph)
|
|
return np;
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Find a property with a given name for a given node
|
|
* and return the value.
|
|
*/
|
|
unsigned char *
|
|
get_property(struct device_node *np, const char *name, int *lenp)
|
|
{
|
|
struct property *pp;
|
|
|
|
for (pp = np->properties; pp != 0; pp = pp->next)
|
|
if (pp->name != NULL && strcmp(pp->name, name) == 0) {
|
|
if (lenp != 0)
|
|
*lenp = pp->length;
|
|
return pp->value;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Add a property to a node
|
|
*/
|
|
int
|
|
prom_add_property(struct device_node* np, struct property* prop)
|
|
{
|
|
struct property **next = &np->properties;
|
|
|
|
prop->next = NULL;
|
|
while (*next)
|
|
next = &(*next)->next;
|
|
*next = prop;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* I quickly hacked that one, check against spec ! */
|
|
static inline unsigned long
|
|
bus_space_to_resource_flags(unsigned int bus_space)
|
|
{
|
|
u8 space = (bus_space >> 24) & 0xf;
|
|
if (space == 0)
|
|
space = 0x02;
|
|
if (space == 0x02)
|
|
return IORESOURCE_MEM;
|
|
else if (space == 0x01)
|
|
return IORESOURCE_IO;
|
|
else {
|
|
printk(KERN_WARNING "prom.c: bus_space_to_resource_flags(), space: %x\n",
|
|
bus_space);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static struct resource*
|
|
find_parent_pci_resource(struct pci_dev* pdev, struct address_range *range)
|
|
{
|
|
unsigned long mask;
|
|
int i;
|
|
|
|
/* Check this one */
|
|
mask = bus_space_to_resource_flags(range->space);
|
|
for (i=0; i<DEVICE_COUNT_RESOURCE; i++) {
|
|
if ((pdev->resource[i].flags & mask) == mask &&
|
|
pdev->resource[i].start <= range->address &&
|
|
pdev->resource[i].end > range->address) {
|
|
if ((range->address + range->size - 1) > pdev->resource[i].end) {
|
|
/* Add better message */
|
|
printk(KERN_WARNING "PCI/OF resource overlap !\n");
|
|
return NULL;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
if (i == DEVICE_COUNT_RESOURCE)
|
|
return NULL;
|
|
return &pdev->resource[i];
|
|
}
|
|
|
|
/*
|
|
* Request an OF device resource. Currently handles child of PCI devices,
|
|
* or other nodes attached to the root node. Ultimately, put some
|
|
* link to resources in the OF node.
|
|
*/
|
|
struct resource*
|
|
request_OF_resource(struct device_node* node, int index, const char* name_postfix)
|
|
{
|
|
struct pci_dev* pcidev;
|
|
u8 pci_bus, pci_devfn;
|
|
unsigned long iomask;
|
|
struct device_node* nd;
|
|
struct resource* parent;
|
|
struct resource *res = NULL;
|
|
int nlen, plen;
|
|
|
|
if (index >= node->n_addrs)
|
|
goto fail;
|
|
|
|
/* Sanity check on bus space */
|
|
iomask = bus_space_to_resource_flags(node->addrs[index].space);
|
|
if (iomask & IORESOURCE_MEM)
|
|
parent = &iomem_resource;
|
|
else if (iomask & IORESOURCE_IO)
|
|
parent = &ioport_resource;
|
|
else
|
|
goto fail;
|
|
|
|
/* Find a PCI parent if any */
|
|
nd = node;
|
|
pcidev = NULL;
|
|
while(nd) {
|
|
if (!pci_device_from_OF_node(nd, &pci_bus, &pci_devfn))
|
|
pcidev = pci_find_slot(pci_bus, pci_devfn);
|
|
if (pcidev) break;
|
|
nd = nd->parent;
|
|
}
|
|
if (pcidev)
|
|
parent = find_parent_pci_resource(pcidev, &node->addrs[index]);
|
|
if (!parent) {
|
|
printk(KERN_WARNING "request_OF_resource(%s), parent not found\n",
|
|
node->name);
|
|
goto fail;
|
|
}
|
|
|
|
res = __request_region(parent, node->addrs[index].address, node->addrs[index].size, NULL);
|
|
if (!res)
|
|
goto fail;
|
|
nlen = strlen(node->name);
|
|
plen = name_postfix ? strlen(name_postfix) : 0;
|
|
res->name = (const char *)kmalloc(nlen+plen+1, GFP_KERNEL);
|
|
if (res->name) {
|
|
strcpy((char *)res->name, node->name);
|
|
if (plen)
|
|
strcpy((char *)res->name+nlen, name_postfix);
|
|
}
|
|
return res;
|
|
fail:
|
|
return NULL;
|
|
}
|
|
|
|
int
|
|
release_OF_resource(struct device_node* node, int index)
|
|
{
|
|
struct pci_dev* pcidev;
|
|
u8 pci_bus, pci_devfn;
|
|
unsigned long iomask, start, end;
|
|
struct device_node* nd;
|
|
struct resource* parent;
|
|
struct resource *res = NULL;
|
|
|
|
if (index >= node->n_addrs)
|
|
return -EINVAL;
|
|
|
|
/* Sanity check on bus space */
|
|
iomask = bus_space_to_resource_flags(node->addrs[index].space);
|
|
if (iomask & IORESOURCE_MEM)
|
|
parent = &iomem_resource;
|
|
else if (iomask & IORESOURCE_IO)
|
|
parent = &ioport_resource;
|
|
else
|
|
return -EINVAL;
|
|
|
|
/* Find a PCI parent if any */
|
|
nd = node;
|
|
pcidev = NULL;
|
|
while(nd) {
|
|
if (!pci_device_from_OF_node(nd, &pci_bus, &pci_devfn))
|
|
pcidev = pci_find_slot(pci_bus, pci_devfn);
|
|
if (pcidev) break;
|
|
nd = nd->parent;
|
|
}
|
|
if (pcidev)
|
|
parent = find_parent_pci_resource(pcidev, &node->addrs[index]);
|
|
if (!parent) {
|
|
printk(KERN_WARNING "release_OF_resource(%s), parent not found\n",
|
|
node->name);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/* Find us in the parent and its childs */
|
|
res = parent->child;
|
|
start = node->addrs[index].address;
|
|
end = start + node->addrs[index].size - 1;
|
|
while (res) {
|
|
if (res->start == start && res->end == end &&
|
|
(res->flags & IORESOURCE_BUSY))
|
|
break;
|
|
if (res->start <= start && res->end >= end)
|
|
res = res->child;
|
|
else
|
|
res = res->sibling;
|
|
}
|
|
if (!res)
|
|
return -ENODEV;
|
|
|
|
kfree(res->name);
|
|
res->name = NULL;
|
|
release_resource(res);
|
|
kfree(res);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 0
|
|
void
|
|
print_properties(struct device_node *np)
|
|
{
|
|
struct property *pp;
|
|
char *cp;
|
|
int i, n;
|
|
|
|
for (pp = np->properties; pp != 0; pp = pp->next) {
|
|
printk(KERN_INFO "%s", pp->name);
|
|
for (i = strlen(pp->name); i < 16; ++i)
|
|
printk(" ");
|
|
cp = (char *) pp->value;
|
|
for (i = pp->length; i > 0; --i, ++cp)
|
|
if ((i > 1 && (*cp < 0x20 || *cp > 0x7e))
|
|
|| (i == 1 && *cp != 0))
|
|
break;
|
|
if (i == 0 && pp->length > 1) {
|
|
/* looks like a string */
|
|
printk(" %s\n", (char *) pp->value);
|
|
} else {
|
|
/* dump it in hex */
|
|
n = pp->length;
|
|
if (n > 64)
|
|
n = 64;
|
|
if (pp->length % 4 == 0) {
|
|
unsigned int *p = (unsigned int *) pp->value;
|
|
|
|
n /= 4;
|
|
for (i = 0; i < n; ++i) {
|
|
if (i != 0 && (i % 4) == 0)
|
|
printk("\n ");
|
|
printk(" %08x", *p++);
|
|
}
|
|
} else {
|
|
unsigned char *bp = pp->value;
|
|
|
|
for (i = 0; i < n; ++i) {
|
|
if (i != 0 && (i % 16) == 0)
|
|
printk("\n ");
|
|
printk(" %02x", *bp++);
|
|
}
|
|
}
|
|
printk("\n");
|
|
if (pp->length > 64)
|
|
printk(" ... (length = %d)\n",
|
|
pp->length);
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
|
|
static DEFINE_SPINLOCK(rtas_lock);
|
|
|
|
/* this can be called after setup -- Cort */
|
|
int
|
|
call_rtas(const char *service, int nargs, int nret,
|
|
unsigned long *outputs, ...)
|
|
{
|
|
va_list list;
|
|
int i;
|
|
unsigned long s;
|
|
struct device_node *rtas;
|
|
int *tokp;
|
|
union {
|
|
unsigned long words[16];
|
|
double align;
|
|
} u;
|
|
|
|
rtas = find_devices("rtas");
|
|
if (rtas == NULL)
|
|
return -1;
|
|
tokp = (int *) get_property(rtas, service, NULL);
|
|
if (tokp == NULL) {
|
|
printk(KERN_ERR "No RTAS service called %s\n", service);
|
|
return -1;
|
|
}
|
|
u.words[0] = *tokp;
|
|
u.words[1] = nargs;
|
|
u.words[2] = nret;
|
|
va_start(list, outputs);
|
|
for (i = 0; i < nargs; ++i)
|
|
u.words[i+3] = va_arg(list, unsigned long);
|
|
va_end(list);
|
|
|
|
/*
|
|
* RTAS doesn't use floating point.
|
|
* Or at least, according to the CHRP spec we enter RTAS
|
|
* with FP disabled, and it doesn't change the FP registers.
|
|
* -- paulus.
|
|
*/
|
|
spin_lock_irqsave(&rtas_lock, s);
|
|
enter_rtas((void *)__pa(&u));
|
|
spin_unlock_irqrestore(&rtas_lock, s);
|
|
|
|
if (nret > 1 && outputs != NULL)
|
|
for (i = 0; i < nret-1; ++i)
|
|
outputs[i] = u.words[i+nargs+4];
|
|
return u.words[nargs+3];
|
|
}
|