forked from luck/tmp_suning_uos_patched
powerpc/fsl-booke: Enable L1 cache on e500v1/e500v2/e500mc CPUs
Some boot loaders may not enable L1 instruction/data cache. Check if data and instruction caches are enabled, and enable them if needed. Signed-off-by: Nate Case <ncase@xes-inc.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
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c7a7a5b9a2
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cab888e678
@ -389,12 +389,14 @@
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#define ICCR_CACHE 1 /* Cacheable */
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#define ICCR_CACHE 1 /* Cacheable */
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/* Bit definitions for L1CSR0. */
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/* Bit definitions for L1CSR0. */
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#define L1CSR0_CPE 0x00010000 /* Data Cache Parity Enable */
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#define L1CSR0_CLFC 0x00000100 /* Cache Lock Bits Flash Clear */
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#define L1CSR0_CLFC 0x00000100 /* Cache Lock Bits Flash Clear */
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#define L1CSR0_DCFI 0x00000002 /* Data Cache Flash Invalidate */
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#define L1CSR0_DCFI 0x00000002 /* Data Cache Flash Invalidate */
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#define L1CSR0_CFI 0x00000002 /* Cache Flash Invalidate */
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#define L1CSR0_CFI 0x00000002 /* Cache Flash Invalidate */
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#define L1CSR0_DCE 0x00000001 /* Data Cache Enable */
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#define L1CSR0_DCE 0x00000001 /* Data Cache Enable */
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/* Bit definitions for L1CSR1. */
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/* Bit definitions for L1CSR1. */
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#define L1CSR1_CPE 0x00010000 /* Instruction Cache Parity Enable */
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#define L1CSR1_ICLFR 0x00000100 /* Instr Cache Lock Bits Flash Reset */
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#define L1CSR1_ICLFR 0x00000100 /* Instr Cache Lock Bits Flash Reset */
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#define L1CSR1_ICFI 0x00000002 /* Instr Cache Flash Invalidate */
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#define L1CSR1_ICFI 0x00000002 /* Instr Cache Flash Invalidate */
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#define L1CSR1_ICE 0x00000001 /* Instr Cache Enable */
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#define L1CSR1_ICE 0x00000001 /* Instr Cache Enable */
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@ -17,6 +17,40 @@
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#include <asm/cputable.h>
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#include <asm/cputable.h>
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#include <asm/ppc_asm.h>
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#include <asm/ppc_asm.h>
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_GLOBAL(__e500_icache_setup)
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mfspr r0, SPRN_L1CSR1
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andi. r3, r0, L1CSR1_ICE
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bnelr /* Already enabled */
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oris r0, r0, L1CSR1_CPE@h
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ori r0, r0, (L1CSR1_ICFI | L1CSR1_ICLFR | L1CSR1_ICE)
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mtspr SPRN_L1CSR1, r0 /* Enable I-Cache */
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isync
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blr
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_GLOBAL(__e500_dcache_setup)
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mfspr r0, SPRN_L1CSR0
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andi. r3, r0, L1CSR0_DCE
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bnelr /* Already enabled */
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msync
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isync
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li r0, 0
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mtspr SPRN_L1CSR0, r0 /* Disable */
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msync
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isync
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li r0, (L1CSR0_DCFI | L1CSR0_CLFC)
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mtspr SPRN_L1CSR0, r0 /* Invalidate */
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isync
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1: mfspr r0, SPRN_L1CSR0
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andi. r3, r0, L1CSR0_CLFC
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bne+ 1b /* Wait for lock bits reset */
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oris r0, r0, L1CSR0_CPE@h
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ori r0, r0, L1CSR0_DCE
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msync
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isync
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mtspr SPRN_L1CSR0, r0 /* Enable */
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isync
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blr
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_GLOBAL(__setup_cpu_e200)
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_GLOBAL(__setup_cpu_e200)
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/* enable dedicated debug exception handling resources (Debug APU) */
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/* enable dedicated debug exception handling resources (Debug APU) */
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mfspr r3,SPRN_HID0
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mfspr r3,SPRN_HID0
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@ -25,7 +59,16 @@ _GLOBAL(__setup_cpu_e200)
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b __setup_e200_ivors
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b __setup_e200_ivors
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_GLOBAL(__setup_cpu_e500v1)
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_GLOBAL(__setup_cpu_e500v1)
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_GLOBAL(__setup_cpu_e500v2)
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_GLOBAL(__setup_cpu_e500v2)
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b __setup_e500_ivors
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mflr r4
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bl __e500_icache_setup
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bl __e500_dcache_setup
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bl __setup_e500_ivors
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mtlr r4
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blr
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_GLOBAL(__setup_cpu_e500mc)
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_GLOBAL(__setup_cpu_e500mc)
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b __setup_e500mc_ivors
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mflr r4
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bl __e500_icache_setup
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bl __e500_dcache_setup
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bl __setup_e500mc_ivors
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mtlr r4
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blr
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