summaryrefslogtreecommitdiffstats
path: root/include/asm-mips/mach-pnx8550/kernel-entry-init.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-mips/mach-pnx8550/kernel-entry-init.h')
-rw-r--r--include/asm-mips/mach-pnx8550/kernel-entry-init.h262
1 files changed, 0 insertions, 262 deletions
diff --git a/include/asm-mips/mach-pnx8550/kernel-entry-init.h b/include/asm-mips/mach-pnx8550/kernel-entry-init.h
deleted file mode 100644
index bdde00c9199..00000000000
--- a/include/asm-mips/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 */