diff options
| -rw-r--r-- | include/asm-arm/arch-s3c2410/uncompress.h | 142 | ||||
| -rw-r--r-- | include/asm-arm/plat-s3c/uncompress.h | 155 |
2 files changed, 166 insertions, 131 deletions
diff --git a/include/asm-arm/arch-s3c2410/uncompress.h b/include/asm-arm/arch-s3c2410/uncompress.h index d78f3dca7d7e..22328b70ba5d 100644 --- a/include/asm-arm/arch-s3c2410/uncompress.h +++ b/include/asm-arm/arch-s3c2410/uncompress.h @@ -13,153 +13,33 @@ #ifndef __ASM_ARCH_UNCOMPRESS_H #define __ASM_ARCH_UNCOMPRESS_H -typedef unsigned int upf_t; /* cannot include linux/serial_core.h */ - -/* defines for UART registers */ -#include "asm/plat-s3c/regs-serial.h" -#include "asm/arch/regs-gpio.h" -#include "asm/plat-s3c/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))) + +#include <asm/plat-s3c/uncompress.h> /* 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_S3C_LOWLEVEL_UART_PORT) - -static __inline__ void -uart_wr(unsigned int reg, unsigned int val) -{ - volatile unsigned int *ptr; - - ptr = (volatile unsigned int *)(reg + uart_base); - *ptr = val; -} - -static __inline__ unsigned int -uart_rd(unsigned int reg) -{ - volatile unsigned int *ptr; - - ptr = (volatile unsigned int *)(reg + uart_base); - return *ptr; -} - - -/* 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 (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 */ diff --git a/include/asm-arm/plat-s3c/uncompress.h b/include/asm-arm/plat-s3c/uncompress.h new file mode 100644 index 000000000000..bc6817f91e2f --- /dev/null +++ b/include/asm-arm/plat-s3c/uncompress.h @@ -0,0 +1,155 @@ +/* linux/include/asm-arm/plat-s3c/uncompress.h + * + * Copyright 2003, 2007 Simtec Electronics + * http://armlinux.simtec.co.uk/ + * Ben Dooks <ben@simtec.co.uk> + * + * S3C - 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. +*/ + +#ifndef __ASM_PLAT_UNCOMPRESS_H +#define __ASM_PLAT_UNCOMPRESS_H + +typedef unsigned int upf_t; /* cannot include linux/serial_core.h */ + +/* uart setup */ + +static unsigned int fifo_mask; +static unsigned int fifo_max; + +/* forward declerations */ + +static void arch_detect_cpu(void); + +/* defines for UART registers */ + +#include "asm/plat-s3c/regs-serial.h" +#include "asm/plat-s3c/regs-watchdog.h" + +/* working in physical space... */ +#undef S3C2410_WDOGREG +#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_S3C_LOWLEVEL_UART_PORT) + +static __inline__ void +uart_wr(unsigned int reg, unsigned int val) +{ + volatile unsigned int *ptr; + + ptr = (volatile unsigned int *)(reg + uart_base); + *ptr = val; +} + +static __inline__ unsigned int +uart_rd(unsigned int reg) +{ + volatile unsigned int *ptr; + + ptr = (volatile unsigned int *)(reg + uart_base); + return *ptr; +} + +/* 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) +{ + if (uart_rd(S3C2410_UFCON) & S3C2410_UFCON_FIFOMODE) { + int level; + + while (1) { + level = uart_rd(S3C2410_UFSTAT); + level &= fifo_mask; + + if (level < fifo_max) + break; + } + + } else { + /* not using fifos */ + + while ((uart_rd(S3C2410_UTRSTAT) & S3C2410_UTRSTAT_TXE) != S3C2410_UTRSTAT_TXE) + barrier(); + } + + /* 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_detect_cpu(); + arch_decomp_wdog_start(); +} + + +#endif /* __ASM_PLAT_UNCOMPRESS_H */ |