forked from luck/tmp_suning_uos_patched
8ea0de4b88
To be able to relocate the .bss section at run time independently from the rest of the code, we must make sure that no GOTOFF relocations are used with .bss symbols. This usually means that no global variables can be marked static unless they're also const. Let's remove the static qualifier from current offenders, or turn them into const variables when possible. Next commit will ensure the build fails if one of those is reintroduced due to otherwise enforced coding standards for the kernel. Signed-off-by: Nicolas Pitre <nicolas.pitre@linaro.org> Tested-by: Tony Lindgren <tony@atomide.com>
185 lines
3.9 KiB
C
185 lines
3.9 KiB
C
/* arch/arm/plat-samsung/include/plat/uncompress.h
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*
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* Copyright 2003, 2007 Simtec Electronics
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* http://armlinux.simtec.co.uk/
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C - uncompress code
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __ASM_PLAT_UNCOMPRESS_H
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#define __ASM_PLAT_UNCOMPRESS_H
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typedef unsigned int upf_t; /* cannot include linux/serial_core.h */
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/* uart setup */
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unsigned int fifo_mask;
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unsigned int fifo_max;
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/* forward declerations */
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static void arch_detect_cpu(void);
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/* defines for UART registers */
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#include <plat/regs-serial.h>
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#include <plat/regs-watchdog.h>
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/* working in physical space... */
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#undef S3C2410_WDOGREG
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#define S3C2410_WDOGREG(x) ((S3C24XX_PA_WATCHDOG + (x)))
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/* how many bytes we allow into the FIFO at a time in FIFO mode */
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#define FIFO_MAX (14)
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#define uart_base S3C_PA_UART + (S3C_UART_OFFSET * CONFIG_S3C_LOWLEVEL_UART_PORT)
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static __inline__ void
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uart_wr(unsigned int reg, unsigned int val)
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{
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volatile unsigned int *ptr;
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ptr = (volatile unsigned int *)(reg + uart_base);
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*ptr = val;
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}
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static __inline__ unsigned int
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uart_rd(unsigned int reg)
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{
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volatile unsigned int *ptr;
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ptr = (volatile unsigned int *)(reg + uart_base);
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return *ptr;
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}
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/* we can deal with the case the UARTs are being run
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* in FIFO mode, so that we don't hold up our execution
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* waiting for tx to happen...
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*/
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static void putc(int ch)
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{
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if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) {
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int level;
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while (1) {
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level = uart_rd(S3C2410_UFSTAT);
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level &= fifo_mask;
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if (level < fifo_max)
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break;
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}
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} else {
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/* not using fifos */
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while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE)
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barrier();
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}
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/* write byte to transmission register */
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uart_wr(S3C2410_UTXH, ch);
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}
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static inline void flush(void)
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{
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}
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#define __raw_writel(d, ad) \
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do { \
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*((volatile unsigned int __force *)(ad)) = (d); \
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} while (0)
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/* CONFIG_S3C_BOOT_WATCHDOG
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*
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* Simple boot-time watchdog setup, to reboot the system if there is
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* any problem with the boot process
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*/
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#ifdef CONFIG_S3C_BOOT_WATCHDOG
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#define WDOG_COUNT (0xff00)
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static inline void arch_decomp_wdog(void)
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{
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__raw_writel(WDOG_COUNT, S3C2410_WTCNT);
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}
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static void arch_decomp_wdog_start(void)
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{
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__raw_writel(WDOG_COUNT, S3C2410_WTDAT);
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__raw_writel(WDOG_COUNT, S3C2410_WTCNT);
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__raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x80), S3C2410_WTCON);
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}
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#else
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#define arch_decomp_wdog_start()
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#define arch_decomp_wdog()
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#endif
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#ifdef CONFIG_S3C_BOOT_ERROR_RESET
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static void arch_decomp_error(const char *x)
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{
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putstr("\n\n");
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putstr(x);
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putstr("\n\n -- System resetting\n");
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__raw_writel(0x4000, S3C2410_WTDAT);
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__raw_writel(0x4000, S3C2410_WTCNT);
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__raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON);
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while(1);
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}
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#define arch_error arch_decomp_error
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#endif
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#ifdef CONFIG_S3C_BOOT_UART_FORCE_FIFO
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static inline void arch_enable_uart_fifo(void)
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{
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u32 fifocon = uart_rd(S3C2410_UFCON);
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if (!(fifocon & S3C2410_UFCON_FIFOMODE)) {
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fifocon |= S3C2410_UFCON_RESETBOTH;
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uart_wr(S3C2410_UFCON, fifocon);
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/* wait for fifo reset to complete */
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while (1) {
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fifocon = uart_rd(S3C2410_UFCON);
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if (!(fifocon & S3C2410_UFCON_RESETBOTH))
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break;
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}
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}
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}
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#else
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#define arch_enable_uart_fifo() do { } while(0)
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#endif
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static void
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arch_decomp_setup(void)
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{
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/* we may need to setup the uart(s) here if we are not running
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* on an BAST... the BAST will have left the uarts configured
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* after calling linux.
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*/
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arch_detect_cpu();
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arch_decomp_wdog_start();
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/* Enable the UART FIFOs if they where not enabled and our
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* configuration says we should turn them on.
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*/
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arch_enable_uart_fifo();
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}
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#endif /* __ASM_PLAT_UNCOMPRESS_H */
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