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author | Wolfgang Denk <wd@pollux.(none)> | 2005-09-24 23:48:28 (GMT) |
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committer | Wolfgang Denk <wd@pollux.(none)> | 2005-09-24 23:48:28 (GMT) |
commit | 74f4304ee717d0f4b3a27e7fd4a64944749b8783 (patch) | |
tree | 806aadd6a2be863b9a0e4e9649858468b4641c96 /cpu/arm920t | |
parent | e2146b6aea0de16e55530cc5ff58fb626d9870cd (diff) | |
download | u-boot-fsl-qoriq-74f4304ee717d0f4b3a27e7fd4a64944749b8783.tar.xz |
Add ARM946E cpu and core module targets; remap memory to 0x00000000
Patch by Peter Pearse, 2 Feb 2005
Diffstat (limited to 'cpu/arm920t')
-rw-r--r-- | cpu/arm920t/cpu.c | 16 | ||||
-rw-r--r-- | cpu/arm920t/interrupts.c | 8 |
2 files changed, 16 insertions, 8 deletions
diff --git a/cpu/arm920t/cpu.c b/cpu/arm920t/cpu.c index 718f253..2f7963d 100644 --- a/cpu/arm920t/cpu.c +++ b/cpu/arm920t/cpu.c @@ -39,7 +39,7 @@ static unsigned long read_p15_c1 (void) unsigned long value; __asm__ __volatile__( - "mrc p15, 0, %0, c1, c0, 0 @ read control reg\n" + "mrc p15, 0, %0, c1, c0, 0 @ read control reg\n" : "=r" (value) : : "memory"); @@ -57,7 +57,7 @@ static void write_p15_c1 (unsigned long value) printf ("write %08lx to p15/c1\n", value); #endif __asm__ __volatile__( - "mcr p15, 0, %0, c1, c0, 0 @ write it back\n" + "mcr p15, 0, %0, c1, c0, 0 @ write it back\n" : : "r" (value) : "memory"); @@ -73,16 +73,17 @@ static void cp_delay (void) for (i = 0; i < 100; i++); } -/* See also ARM Ref. Man. */ +/* See also ARM920T Technical reference Manual */ #define C1_MMU (1<<0) /* mmu off/on */ #define C1_ALIGN (1<<1) /* alignment faults off/on */ #define C1_DC (1<<2) /* dcache off/on */ -#define C1_BIG_ENDIAN (1<<7) /* big endian 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_IC (1<<12) /* icache off/on */ -#define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */ -#define RESERVED_1 (0xf << 3) /* must be 111b for R/W */ +#define C1_HIGH_VECTORS (1<<13) /* location of vectors: low/high addresses */ + int cpu_init (void) { @@ -119,6 +120,7 @@ int cleanup_before_linux (void) /* flush I/D-cache */ i = 0; asm ("mcr p15, 0, %0, c7, c7, 0": :"r" (i)); + return (0); } @@ -134,7 +136,7 @@ void icache_enable (void) { ulong reg; - reg = read_p15_c1 (); + reg = read_p15_c1 (); /* get control reg. */ cp_delay (); write_p15_c1 (reg | C1_IC); } diff --git a/cpu/arm920t/interrupts.c b/cpu/arm920t/interrupts.c index bfab519..1d254c7 100644 --- a/cpu/arm920t/interrupts.c +++ b/cpu/arm920t/interrupts.c @@ -30,7 +30,6 @@ */ #include <common.h> - #include <arm920t.h> #include <asm/proc-armv/ptrace.h> @@ -162,7 +161,14 @@ void do_fiq (struct pt_regs *pt_regs) void do_irq (struct pt_regs *pt_regs) { +#if defined (CONFIG_USE_IRQ) && defined (CONFIG_ARCH_INTEGRATOR) + /* ASSUMED to be a timer interrupt */ + /* Just clear it - count handled in */ + /* integratorap.c */ + *(volatile ulong *)(CFG_TIMERBASE + 0x0C) = 0; +#else printf ("interrupt request\n"); show_regs (pt_regs); bad_mode (); +#endif } |