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[PATCH] ppc32: 8xx commproc avoid direct pte manipulation, use dma coherent API instead

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Touching the pte directly causes the 8Mbyte TLB entry to be invalidated.

This has been fixed in v2.4 for ages.

Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Marcelo Tosatti 2005-08-07 09:42:47 -07:00 committed by Linus Torvalds
parent 204085c52a
commit 079da354db
2 changed files with 3 additions and 23 deletions
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18
arch/ppc/8xx_io/commproc.c
View File

@ -39,8 +39,6 @@
#include <asm/tlbflush.h>
#include <asm/rheap.h>
extern int get_pteptr(struct mm_struct *mm, unsigned long addr, pte_t **ptep);
static void m8xx_cpm_dpinit(void);
static uint host_buffer; /* One page of host buffer */
static uint host_end; /* end + 1 */
@ -108,14 +106,11 @@ struct hw_interrupt_type cpm_pic = {
.end = cpm_eoi,
};
extern void flush_tlb_page(struct vm_area_struct *vma, unsigned long vmaddr);
void
m8xx_cpm_reset(uint bootpage)
m8xx_cpm_reset(void)
{
volatile immap_t *imp;
volatile cpm8xx_t *commproc;
pte_t *pte;
imp = (immap_t *)IMAP_ADDR;
commproc = (cpm8xx_t *)&imp->im_cpm;
@ -143,17 +138,6 @@ m8xx_cpm_reset(uint bootpage)
/* Reclaim the DP memory for our use. */
m8xx_cpm_dpinit();
/* get the PTE for the bootpage */
if (!get_pteptr(&init_mm, bootpage, &pte))
panic("get_pteptr failed\n");
/* and make it uncachable */
pte_val(*pte) |= _PAGE_NO_CACHE;
_tlbie(bootpage);
host_buffer = bootpage;
host_end = host_buffer + PAGE_SIZE;
/* Tell everyone where the comm processor resides.
*/
cpmp = (cpm8xx_t *)commproc;

8
arch/ppc/syslib/m8xx_setup.c
View File

@ -57,7 +57,7 @@ unsigned char __res[sizeof(bd_t)];
extern void m8xx_ide_init(void);
extern unsigned long find_available_memory(void);
extern void m8xx_cpm_reset(uint cpm_page);
extern void m8xx_cpm_reset();
extern void m8xx_wdt_handler_install(bd_t *bp);
extern void rpxfb_alloc_pages(void);
extern void cpm_interrupt_init(void);
@ -70,13 +70,9 @@ board_init(void)
void __init
m8xx_setup_arch(void)
{
int cpm_page;
cpm_page = (int) alloc_bootmem_pages(PAGE_SIZE);
/* Reset the Communication Processor Module.
*/
m8xx_cpm_reset(cpm_page);
m8xx_cpm_reset();
#ifdef CONFIG_FB_RPX
rpxfb_alloc_pages();