X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=cpu%2Farm720t%2Fcpu.c;h=60c1aa90b6b97d6f133b62a3e7820df47ff8af03;hb=19bf91f9628f80a55d4f171df71041574882b3d6;hp=b6fcef9b435e34432a61d01fe7e40b6434da2008;hpb=a8c7c708a9e0051c6358718c53572a4681eaa22b;p=u-boot diff --git a/cpu/arm720t/cpu.c b/cpu/arm720t/cpu.c index b6fcef9b43..60c1aa90b6 100644 --- a/cpu/arm720t/cpu.c +++ b/cpu/arm720t/cpu.c @@ -33,51 +33,7 @@ #include #include #include - -/* read co-processor 15, register #1 (control register) */ -static unsigned long read_p15_c1(void) -{ - unsigned long value; - - __asm__ __volatile__( - "mrc p15, 0, %0, c1, c0, 0 @ read control reg\n" - : "=r" (value) - : - : "memory"); - /* printf("p15/c1 is = %08lx\n", value); */ - return value; -} - -/* write to co-processor 15, register #1 (control register) */ -static void write_p15_c1(unsigned long value) -{ - /* printf("write %08lx to p15/c1\n", value); */ - __asm__ __volatile__( - "mcr p15, 0, %0, c1, c0, 0 @ write it back\n" - : - : "r" (value) - : "memory"); - - read_p15_c1(); -} - -static void cp_delay (void) -{ - volatile int i; - - /* copro seems to need some delay between reading and writing */ - for (i = 0; i < 100; i++); -} - -/* See also ARM Ref. Man. */ -#define C1_MMU (1<<0) /* mmu off/on */ -#define C1_ALIGN (1<<1) /* alignment faults off/on */ -#define C1_IDC (1<<2) /* icache and/or dcache off/on */ -#define C1_WRITE_BUFFER (1<<3) /* write buffer off/on */ -#define C1_BIG_ENDIAN (1<<7) /* big endian off/on */ -#define C1_SYS_PROT (1<<8) /* system protection */ -#define C1_ROM_PROT (1<<9) /* ROM protection */ -#define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */ +#include int cpu_init (void) { @@ -85,9 +41,7 @@ int cpu_init (void) * setup up stacks if necessary */ #ifdef CONFIG_USE_IRQ - DECLARE_GLOBAL_DATA_PTR; - - IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4; + IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4; FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ; #endif return 0; @@ -103,6 +57,7 @@ int cleanup_before_linux (void) * and we set the CPU-speed to 73 MHz - see start.S for details */ +#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_ARMADILLO) unsigned long i; disable_interrupts (); @@ -114,24 +69,80 @@ int cleanup_before_linux (void) /* flush I-cache */ asm ("mcr p15, 0, %0, c7, c5, 0": :"r" (i)); - #ifdef CONFIG_ARM7_REVD /* go to high speed */ IO_SYSCON3 = (IO_SYSCON3 & ~CLKCTL) | CLKCTL_73; +#endif +#elif defined(CONFIG_NETARM) || defined(CONFIG_S3C4510B) || defined(CONFIG_LPC2292) + disable_interrupts (); + /* Nothing more needed */ +#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR) + /* No cleanup before linux for IntegratorAP/CM720T as yet */ +#else +#error No cleanup_before_linux() defined for this CPU type #endif return 0; } int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]) { - extern void reset_cpu (ulong addr); - disable_interrupts (); reset_cpu (0); /*NOTREACHED*/ return (0); } +/* + * Instruction and Data cache enable and disable functions + * + */ + +#if defined(CONFIG_IMPA7) || defined(CONFIG_EP7312) || defined(CONFIG_NETARM) || defined(CONFIG_ARMADILLO) +/* read co-processor 15, register #1 (control register) */ +static unsigned long read_p15_c1(void) +{ + unsigned long value; + + __asm__ __volatile__( + "mrc p15, 0, %0, c1, c0, 0 @ read control reg\n" + : "=r" (value) + : + : "memory"); + /* printf("p15/c1 is = %08lx\n", value); */ + return value; +} + +/* write to co-processor 15, register #1 (control register) */ +static void write_p15_c1(unsigned long value) +{ + /* printf("write %08lx to p15/c1\n", value); */ + __asm__ __volatile__( + "mcr p15, 0, %0, c1, c0, 0 @ write it back\n" + : + : "r" (value) + : "memory"); + + read_p15_c1(); +} + +static void cp_delay (void) +{ + volatile int i; + + /* copro seems to need some delay between reading and writing */ + for (i = 0; i < 100; i++); +} + +/* See also ARM Ref. Man. */ +#define C1_MMU (1<<0) /* mmu off/on */ +#define C1_ALIGN (1<<1) /* alignment faults off/on */ +#define C1_IDC (1<<2) /* icache and/or dcache off/on */ +#define C1_WRITE_BUFFER (1<<3) /* write buffer off/on */ +#define C1_BIG_ENDIAN (1<<7) /* big endian off/on */ +#define C1_SYS_PROT (1<<8) /* system protection */ +#define C1_ROM_PROT (1<<9) /* ROM protection */ +#define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */ + void icache_enable (void) { ulong reg; @@ -177,3 +188,71 @@ int dcache_status (void) { return (read_p15_c1 () & C1_IDC) != 0; } + +#elif defined(CONFIG_S3C4510B) + +void icache_enable (void) +{ + s32 i; + + /* disable all cache bits */ + CLR_REG( REG_SYSCFG, 0x3F); + + /* 8KB cache, write enable */ + SET_REG( REG_SYSCFG, CACHE_WRITE_BUFF | CACHE_MODE_01); + + /* clear TAG RAM bits */ + for ( i = 0; i < 256; i++) + PUT_REG( CACHE_TAG_RAM + 4*i, 0x00000000); + + /* clear SET0 RAM */ + for(i=0; i < 1024; i++) + PUT_REG( CACHE_SET0_RAM + 4*i, 0x00000000); + + /* clear SET1 RAM */ + for(i=0; i < 1024; i++) + PUT_REG( CACHE_SET1_RAM + 4*i, 0x00000000); + + /* enable cache */ + SET_REG( REG_SYSCFG, CACHE_ENABLE); + +} + +void icache_disable (void) +{ + /* disable all cache bits */ + CLR_REG( REG_SYSCFG, 0x3F); +} + +int icache_status (void) +{ + return GET_REG( REG_SYSCFG) & CACHE_ENABLE; +} + +void dcache_enable (void) +{ + /* we don't have seperate instruction/data caches */ + icache_enable(); +} + +void dcache_disable (void) +{ + /* we don't have seperate instruction/data caches */ + icache_disable(); +} + +int dcache_status (void) +{ + /* we don't have seperate instruction/data caches */ + return icache_status(); +} + +#elif defined(CONFIG_INTEGRATOR) && defined(CONFIG_ARCH_INTEGRATOR) + /* No specific cache setup for IntegratorAP/CM720T as yet */ + void icache_enable (void) + { + } +#elif defined(CONFIG_LPC2292) /* just to satisfy the compiler */ +#else +#error No icache/dcache enable/disable functions defined for this CPU type +#endif