diff options
Diffstat (limited to 'arch/mips/include/asm/mach-pnx8550/kernel-entry-init.h')
| -rw-r--r-- | arch/mips/include/asm/mach-pnx8550/kernel-entry-init.h | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/arch/mips/include/asm/mach-pnx8550/kernel-entry-init.h b/arch/mips/include/asm/mach-pnx8550/kernel-entry-init.h deleted file mode 100644 index bdde00c9199b..000000000000 --- a/arch/mips/include/asm/mach-pnx8550/kernel-entry-init.h +++ /dev/null @@ -1,262 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Copyright (C) 2005 Embedded Alley Solutions, Inc - */ -#ifndef __ASM_MACH_KERNEL_ENTRY_INIT_H -#define __ASM_MACH_KERNEL_ENTRY_INIT_H - -#include <asm/cacheops.h> -#include <asm/addrspace.h> - -#define CO_CONFIGPR_VALID 0x3F1F41FF /* valid bits to write to ConfigPR */ -#define HAZARD_CP0 nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; nop; -#define CACHE_OPC 0xBC000000 /* MIPS cache instruction opcode */ -#define ICACHE_LINE_SIZE 32 /* Instruction cache line size bytes */ -#define DCACHE_LINE_SIZE 32 /* Data cache line size in bytes */ - -#define ICACHE_SET_COUNT 256 /* Instruction cache set count */ -#define DCACHE_SET_COUNT 128 /* Data cache set count */ - -#define ICACHE_SET_SIZE (ICACHE_SET_COUNT * ICACHE_LINE_SIZE) -#define DCACHE_SET_SIZE (DCACHE_SET_COUNT * DCACHE_LINE_SIZE) - - .macro kernel_entry_setup - .set push - .set noreorder - /* - * PNX8550 entry point, when running a non compressed - * kernel. When loading a zImage, the head.S code in - * arch/mips/zboot/pnx8550 will init the caches and, - * decompress the kernel, and branch to kernel_entry. - */ -cache_begin: li t0, (1<<28) - mtc0 t0, CP0_STATUS /* cp0 usable */ - HAZARD_CP0 - - mtc0 zero, CP0_CAUSE - HAZARD_CP0 - - - /* Set static virtual to phys address translation and TLB disabled */ - mfc0 t0, CP0_CONFIG, 7 - HAZARD_CP0 - - and t0, ~((1<<19) | (1<<20)) /* TLB/MAP cleared */ - mtc0 t0, CP0_CONFIG, 7 - HAZARD_CP0 - - /* CPU boots with kseg0 cache algo set to 0x2 -- uncached */ - - init_icache - nop - init_dcache - nop - - cachePr4450ICReset - nop - - cachePr4450DCReset - nop - - /* read ConfigPR into t0 */ - mfc0 t0, CP0_CONFIG, 7 - HAZARD_CP0 - - /* enable the TLB */ - or t0, (1<<19) - - /* disable the ICACHE: at least 10x slower */ - /* or t0, (1<<26) */ - - /* disable the DCACHE; CONFIG_CPU_HAS_LLSC should not be set */ - /* or t0, (1<<27) */ - - and t0, CO_CONFIGPR_VALID - - /* enable TLB. */ - mtc0 t0, CP0_CONFIG, 7 - HAZARD_CP0 -cache_end: - /* Setup CMEM_0 to MMIO address space, 2MB */ - lui t0, 0x1BE0 - addi t0, t0, 0x3 - mtc0 $8, $22, 4 - nop - - /* Setup CMEM_1, 128MB */ - lui t0, 0x1000 - addi t0, t0, 0xf - mtc0 $8, $22, 5 - nop - - - /* Setup CMEM_2, 32MB */ - lui t0, 0x1C00 - addi t0, t0, 0xb - mtc0 $8, $22, 6 - nop - - /* Setup CMEM_3, 0MB */ - lui t0, 0x0 - addi t0, t0, 0x0 - mtc0 $8, $22, 7 - nop - - /* Enable cache */ - mfc0 t0, CP0_CONFIG - HAZARD_CP0 - and t0, t0, 0xFFFFFFF8 - or t0, t0, 3 - mtc0 t0, CP0_CONFIG - HAZARD_CP0 - .set pop - .endm - - .macro init_icache - .set push - .set noreorder - - /* Get Cache Configuration */ - mfc0 t3, CP0_CONFIG, 1 - HAZARD_CP0 - - /* get cache Line size */ - - srl t1, t3, 19 /* C0_CONFIGPR_IL_SHIFT */ - andi t1, t1, 0x7 /* C0_CONFIGPR_IL_MASK */ - beq t1, zero, pr4450_instr_cache_invalidated /* if zero instruction cache is absent */ - nop - addiu t0, t1, 1 - ori t1, zero, 1 - sllv t1, t1, t0 - - /* get max cache Index */ - srl t2, t3, 22 /* C0_CONFIGPR_IS_SHIFT */ - andi t2, t2, 0x7 /* C0_CONFIGPR_IS_MASK */ - addiu t0, t2, 6 - ori t2, zero, 1 - sllv t2, t2, t0 - - /* get max cache way */ - srl t3, t3, 16 /* C0_CONFIGPR_IA_SHIFT */ - andi t3, t3, 0x7 /* C0_CONFIGPR_IA_MASK */ - addiu t3, t3, 1 - - /* total no of cache lines */ - multu t2, t3 /* max index * max way */ - mflo t2 - addiu t2, t2, -1 - - move t0, zero -pr4450_next_instruction_cache_set: - cache Index_Invalidate_I, 0(t0) - addu t0, t0, t1 /* add bytes in a line */ - bne t2, zero, pr4450_next_instruction_cache_set - addiu t2, t2, -1 /* reduce no of lines to invalidate by one */ -pr4450_instr_cache_invalidated: - .set pop - .endm - - .macro init_dcache - .set push - .set noreorder - move t1, zero - - /* Store Tag Information */ - mtc0 zero, CP0_TAGLO, 0 - HAZARD_CP0 - - mtc0 zero, CP0_TAGHI, 0 - HAZARD_CP0 - - /* Cache size is 16384 = 512 lines x 32 bytes per line */ - or t2, zero, (128*4)-1 /* 512 lines */ - /* Invalidate all lines */ -2: - cache Index_Store_Tag_D, 0(t1) - addiu t2, t2, -1 - bne t2, zero, 2b - addiu t1, t1, 32 /* 32 bytes in a line */ - .set pop - .endm - - .macro cachePr4450ICReset - .set push - .set noreorder - - /* Save CP0 status reg on entry; */ - /* disable interrupts during cache reset */ - mfc0 t0, CP0_STATUS /* T0 = interrupt status on entry */ - HAZARD_CP0 - - mtc0 zero, CP0_STATUS /* disable CPU interrupts */ - HAZARD_CP0 - - or t1, zero, zero /* T1 = starting cache index (0) */ - ori t2, zero, (256 - 1) /* T2 = inst cache set cnt - 1 */ - - icache_invd_loop: - /* 9 == register t1 */ - .word CACHE_OPC | (9 << 21) | (Index_Invalidate_I << 16) | \ - (0 * ICACHE_SET_SIZE) /* invalidate inst cache WAY0 */ - .word CACHE_OPC | (9 << 21) | (Index_Invalidate_I << 16) | \ - (1 * ICACHE_SET_SIZE) /* invalidate inst cache WAY1 */ - - addiu t1, t1, ICACHE_LINE_SIZE /* T1 = next cache line index */ - bne t2, zero, icache_invd_loop /* T2 = 0 if all sets invalidated */ - addiu t2, t2, -1 /* decrement T2 set cnt (delay slot) */ - - /* Initialize the latches in the instruction cache tag */ - /* that drive the way selection tri-state bus drivers, by doing a */ - /* dummy load while the instruction cache is still disabled. */ - /* TODO: Is this needed ? */ - la t1, KSEG0 /* T1 = cached memory base address */ - lw zero, 0x0000(t1) /* (dummy read of first memory word) */ - - mtc0 t0, CP0_STATUS /* restore interrupt status on entry */ - HAZARD_CP0 - .set pop - .endm - - .macro cachePr4450DCReset - .set push - .set noreorder - mfc0 t0, CP0_STATUS /* T0 = interrupt status on entry */ - HAZARD_CP0 - mtc0 zero, CP0_STATUS /* disable CPU interrupts */ - HAZARD_CP0 - - /* Writeback/invalidate entire data cache sets/ways/lines */ - or t1, zero, zero /* T1 = starting cache index (0) */ - ori t2, zero, (DCACHE_SET_COUNT - 1) /* T2 = data cache set cnt - 1 */ - - dcache_wbinvd_loop: - /* 9 == register t1 */ - .word CACHE_OPC | (9 << 21) | (Index_Writeback_Inv_D << 16) | \ - (0 * DCACHE_SET_SIZE) /* writeback/invalidate WAY0 */ - .word CACHE_OPC | (9 << 21) | (Index_Writeback_Inv_D << 16) | \ - (1 * DCACHE_SET_SIZE) /* writeback/invalidate WAY1 */ - .word CACHE_OPC | (9 << 21) | (Index_Writeback_Inv_D << 16) | \ - (2 * DCACHE_SET_SIZE) /* writeback/invalidate WAY2 */ - .word CACHE_OPC | (9 << 21) | (Index_Writeback_Inv_D << 16) | \ - (3 * DCACHE_SET_SIZE) /* writeback/invalidate WAY3 */ - - addiu t1, t1, DCACHE_LINE_SIZE /* T1 = next data cache line index */ - bne t2, zero, dcache_wbinvd_loop /* T2 = 0 when wbinvd entire cache */ - addiu t2, t2, -1 /* decrement T2 set cnt (delay slot) */ - - /* Initialize the latches in the data cache tag that drive the way - selection tri-state bus drivers, by doing a dummy load while the - data cache is still in the disabled mode. TODO: Is this needed ? */ - la t1, KSEG0 /* T1 = cached memory base address */ - lw zero, 0x0000(t1) /* (dummy read of first memory word) */ - - mtc0 t0, CP0_STATUS /* restore interrupt status on entry */ - HAZARD_CP0 - .set pop - .endm - -#endif /* __ASM_MACH_KERNEL_ENTRY_INIT_H */ |
