a081568d70
As per the corresponding change to the serial drivers, arrange for ARM decompressors to give CRLF. Move the common putstr code into misc.c such that machines only need to supply "putc" and "flush" functions. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
174 lines
3.9 KiB
C
174 lines
3.9 KiB
C
/* linux/include/asm-arm/arch-s3c2410/uncompress.h
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*
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* (c) 2003 Simtec Electronics
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* Ben Dooks <ben@simtec.co.uk>
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*
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* S3C2410 - 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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* Changelog:
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* 22-May-2003 BJD Created
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* 08-Sep-2003 BJD Moved to linux v2.6
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* 12-Mar-2004 BJD Updated header protection
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* 12-Oct-2004 BJD Take account of debug uart configuration
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* 15-Nov-2004 BJD Fixed uart configuration
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* 22-Feb-2005 BJD Added watchdog to uncompress
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* 04-Apr-2005 LCVR Added support to S3C2400 (no cpuid at GSTATUS1)
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*/
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#ifndef __ASM_ARCH_UNCOMPRESS_H
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#define __ASM_ARCH_UNCOMPRESS_H
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#include <linux/config.h>
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/* defines for UART registers */
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#include "asm/arch/regs-serial.h"
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#include "asm/arch/regs-gpio.h"
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#include "asm/arch/regs-watchdog.h"
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#include <asm/arch/map.h>
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/* working in physical space... */
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#undef S3C2410_GPIOREG
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#undef S3C2410_WDOGREG
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#define S3C2410_GPIOREG(x) ((S3C24XX_PA_GPIO + (x)))
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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 S3C24XX_PA_UART + (0x4000*CONFIG_S3C2410_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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int cpuid = S3C2410_GSTATUS1_2410;
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#ifndef CONFIG_CPU_S3C2400
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cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
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cpuid &= S3C2410_GSTATUS1_IDMASK;
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#endif
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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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if (cpuid == S3C2410_GSTATUS1_2440) {
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level &= S3C2440_UFSTAT_TXMASK;
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level >>= S3C2440_UFSTAT_TXSHIFT;
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} else {
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level &= S3C2410_UFSTAT_TXMASK;
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level >>= S3C2410_UFSTAT_TXSHIFT;
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}
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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) do { *((volatile unsigned int *)(ad)) = (d); } while(0)
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/* CONFIG_S3C2410_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_S3C2410_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(0x40), 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_S3C2410_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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static void error(char *err);
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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_decomp_wdog_start();
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}
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#endif /* __ASM_ARCH_UNCOMPRESS_H */
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