/* linux/include/asm-arm/arch-s3c2410/uncompress.h
*
- * (c) 2003 Simtec Electronics
- * Ben Dooks <ben@simtec.co.uk>
+ * Copyright (c) 2003, 2007 Simtec Electronics
+ * http://armlinux.simtec.co.uk/
+ * Ben Dooks <ben@simtec.co.uk>
*
* S3C2410 - uncompress code
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
- *
- * Changelog:
- * 22-May-2003 BJD Created
- * 08-Sep-2003 BJD Moved to linux v2.6
- * 12-Mar-2004 BJD Updated header protection
- * 12-Oct-2004 BJD Take account of debug uart configuration
- * 15-Nov-2004 BJD Fixed uart configuration
- * 22-Feb-2005 BJD Added watchdog to uncompress
- * 04-Apr-2005 LCVR Added support to S3C2400 (no cpuid at GSTATUS1)
*/
#ifndef __ASM_ARCH_UNCOMPRESS_H
#define __ASM_ARCH_UNCOMPRESS_H
-
-/* defines for UART registers */
-#include "asm/arch/regs-serial.h"
-#include "asm/arch/regs-gpio.h"
-#include "asm/arch/regs-watchdog.h"
-
+#include <asm/arch/regs-gpio.h>
#include <asm/arch/map.h>
/* working in physical space... */
#undef S3C2410_GPIOREG
-#undef S3C2410_WDOGREG
-
#define S3C2410_GPIOREG(x) ((S3C24XX_PA_GPIO + (x)))
-#define S3C2410_WDOGREG(x) ((S3C24XX_PA_WATCHDOG + (x)))
-
-/* how many bytes we allow into the FIFO at a time in FIFO mode */
-#define FIFO_MAX (14)
-#define uart_base S3C24XX_PA_UART + (0x4000*CONFIG_S3C2410_LOWLEVEL_UART_PORT)
+#include <asm/plat-s3c/uncompress.h>
-static __inline__ void
-uart_wr(unsigned int reg, unsigned int val)
+static inline int is_arm926(void)
{
- volatile unsigned int *ptr;
-
- ptr = (volatile unsigned int *)(reg + uart_base);
- *ptr = val;
-}
+ unsigned int cpuid;
-static __inline__ unsigned int
-uart_rd(unsigned int reg)
-{
- volatile unsigned int *ptr;
+ asm volatile ("mrc p15, 0, %0, c1, c0, 0" : "=r" (cpuid));
- ptr = (volatile unsigned int *)(reg + uart_base);
- return *ptr;
+ return ((cpuid & 0xff0) == 0x260);
}
-
-/* we can deal with the case the UARTs are being run
- * in FIFO mode, so that we don't hold up our execution
- * waiting for tx to happen...
-*/
-
-static void putc(int ch)
+static void arch_detect_cpu(void)
{
- int cpuid = S3C2410_GSTATUS1_2410;
+ unsigned int cpuid;
-#ifndef CONFIG_CPU_S3C2400
cpuid = *((volatile unsigned int *)S3C2410_GSTATUS1);
cpuid &= S3C2410_GSTATUS1_IDMASK;
-#endif
-
- if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) {
- int level;
-
- while (1) {
- level = uart_rd(S3C2410_UFSTAT);
-
- if (cpuid == S3C2410_GSTATUS1_2440 ||
- cpuid == S3C2410_GSTATUS1_2442) {
- level &= S3C2440_UFSTAT_TXMASK;
- level >>= S3C2440_UFSTAT_TXSHIFT;
- } else {
- level &= S3C2410_UFSTAT_TXMASK;
- level >>= S3C2410_UFSTAT_TXSHIFT;
- }
-
- if (level < FIFO_MAX)
- break;
- }
+ if (is_arm926() || cpuid == S3C2410_GSTATUS1_2440 ||
+ cpuid == S3C2410_GSTATUS1_2442) {
+ fifo_mask = S3C2440_UFSTAT_TXMASK;
+ fifo_max = 63 << S3C2440_UFSTAT_TXSHIFT;
} else {
- /* not using fifos */
-
- while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE)
- barrier();
+ fifo_mask = S3C2410_UFSTAT_TXMASK;
+ fifo_max = 15 << S3C2410_UFSTAT_TXSHIFT;
}
-
- /* write byte to transmission register */
- uart_wr(S3C2410_UTXH, ch);
-}
-
-static inline void flush(void)
-{
-}
-
-#define __raw_writel(d,ad) do { *((volatile unsigned int *)(ad)) = (d); } while(0)
-
-/* CONFIG_S3C2410_BOOT_WATCHDOG
- *
- * Simple boot-time watchdog setup, to reboot the system if there is
- * any problem with the boot process
-*/
-
-#ifdef CONFIG_S3C2410_BOOT_WATCHDOG
-
-#define WDOG_COUNT (0xff00)
-
-static inline void arch_decomp_wdog(void)
-{
- __raw_writel(WDOG_COUNT, S3C2410_WTCNT);
}
-static void arch_decomp_wdog_start(void)
-{
- __raw_writel(WDOG_COUNT, S3C2410_WTDAT);
- __raw_writel(WDOG_COUNT, S3C2410_WTCNT);
- __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x80), S3C2410_WTCON);
-}
-
-#else
-#define arch_decomp_wdog_start()
-#define arch_decomp_wdog()
-#endif
-
-#ifdef CONFIG_S3C2410_BOOT_ERROR_RESET
-
-static void arch_decomp_error(const char *x)
-{
- putstr("\n\n");
- putstr(x);
- putstr("\n\n -- System resetting\n");
-
- __raw_writel(0x4000, S3C2410_WTDAT);
- __raw_writel(0x4000, S3C2410_WTCNT);
- __raw_writel(S3C2410_WTCON_ENABLE | S3C2410_WTCON_DIV128 | S3C2410_WTCON_RSTEN | S3C2410_WTCON_PRESCALE(0x40), S3C2410_WTCON);
-
- while(1);
-}
-
-#define arch_error arch_decomp_error
-#endif
-
-static void error(char *err);
-
-static void
-arch_decomp_setup(void)
-{
- /* we may need to setup the uart(s) here if we are not running
- * on an BAST... the BAST will have left the uarts configured
- * after calling linux.
- */
-
- arch_decomp_wdog_start();
-}
-
-
#endif /* __ASM_ARCH_UNCOMPRESS_H */
projects / linux-2.6-omap-h63xx.git / blobdiff