| /* |
| * This file contains miscellaneous low-level functions. |
| * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) |
| * |
| * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) |
| * and Paul Mackerras. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| * |
| */ |
| |
| #include <linux/config.h> |
| #include <linux/sys.h> |
| #include <asm/unistd.h> |
| #include <asm/errno.h> |
| #include <asm/processor.h> |
| #include <asm/page.h> |
| #include <asm/cache.h> |
| #include <asm/cputable.h> |
| #include <asm/mmu.h> |
| #include <asm/ppc_asm.h> |
| #include <asm/thread_info.h> |
| #include <asm/asm-offsets.h> |
| |
| #ifdef CONFIG_8xx |
| #define ISYNC_8xx isync |
| #else |
| #define ISYNC_8xx |
| #endif |
| .text |
| |
| .align 5 |
| _GLOBAL(__delay) |
| cmpwi 0,r3,0 |
| mtctr r3 |
| beqlr |
| 1: bdnz 1b |
| blr |
| |
| /* |
| * Returns (address we're running at) - (address we were linked at) |
| * for use before the text and data are mapped to KERNELBASE. |
| */ |
| _GLOBAL(reloc_offset) |
| mflr r0 |
| bl 1f |
| 1: mflr r3 |
| lis r4,1b@ha |
| addi r4,r4,1b@l |
| subf r3,r4,r3 |
| mtlr r0 |
| blr |
| |
| /* |
| * add_reloc_offset(x) returns x + reloc_offset(). |
| */ |
| _GLOBAL(add_reloc_offset) |
| mflr r0 |
| bl 1f |
| 1: mflr r5 |
| lis r4,1b@ha |
| addi r4,r4,1b@l |
| subf r5,r4,r5 |
| add r3,r3,r5 |
| mtlr r0 |
| blr |
| |
| /* |
| * sub_reloc_offset(x) returns x - reloc_offset(). |
| */ |
| _GLOBAL(sub_reloc_offset) |
| mflr r0 |
| bl 1f |
| 1: mflr r5 |
| lis r4,1b@ha |
| addi r4,r4,1b@l |
| subf r5,r4,r5 |
| subf r3,r5,r3 |
| mtlr r0 |
| blr |
| |
| /* |
| * reloc_got2 runs through the .got2 section adding an offset |
| * to each entry. |
| */ |
| _GLOBAL(reloc_got2) |
| mflr r11 |
| lis r7,__got2_start@ha |
| addi r7,r7,__got2_start@l |
| lis r8,__got2_end@ha |
| addi r8,r8,__got2_end@l |
| subf r8,r7,r8 |
| srwi. r8,r8,2 |
| beqlr |
| mtctr r8 |
| bl 1f |
| 1: mflr r0 |
| lis r4,1b@ha |
| addi r4,r4,1b@l |
| subf r0,r4,r0 |
| add r7,r0,r7 |
| 2: lwz r0,0(r7) |
| add r0,r0,r3 |
| stw r0,0(r7) |
| addi r7,r7,4 |
| bdnz 2b |
| mtlr r11 |
| blr |
| |
| /* |
| * identify_cpu, |
| * called with r3 = data offset and r4 = CPU number |
| * doesn't change r3 |
| */ |
| _GLOBAL(identify_cpu) |
| addis r8,r3,cpu_specs@ha |
| addi r8,r8,cpu_specs@l |
| mfpvr r7 |
| 1: |
| lwz r5,CPU_SPEC_PVR_MASK(r8) |
| and r5,r5,r7 |
| lwz r6,CPU_SPEC_PVR_VALUE(r8) |
| cmplw 0,r6,r5 |
| beq 1f |
| addi r8,r8,CPU_SPEC_ENTRY_SIZE |
| b 1b |
| 1: |
| addis r6,r3,cur_cpu_spec@ha |
| addi r6,r6,cur_cpu_spec@l |
| sub r8,r8,r3 |
| stw r8,0(r6) |
| blr |
| |
| /* |
| * do_cpu_ftr_fixups - goes through the list of CPU feature fixups |
| * and writes nop's over sections of code that don't apply for this cpu. |
| * r3 = data offset (not changed) |
| */ |
| _GLOBAL(do_cpu_ftr_fixups) |
| /* Get CPU 0 features */ |
| addis r6,r3,cur_cpu_spec@ha |
| addi r6,r6,cur_cpu_spec@l |
| lwz r4,0(r6) |
| add r4,r4,r3 |
| lwz r4,CPU_SPEC_FEATURES(r4) |
| |
| /* Get the fixup table */ |
| addis r6,r3,__start___ftr_fixup@ha |
| addi r6,r6,__start___ftr_fixup@l |
| addis r7,r3,__stop___ftr_fixup@ha |
| addi r7,r7,__stop___ftr_fixup@l |
| |
| /* Do the fixup */ |
| 1: cmplw 0,r6,r7 |
| bgelr |
| addi r6,r6,16 |
| lwz r8,-16(r6) /* mask */ |
| and r8,r8,r4 |
| lwz r9,-12(r6) /* value */ |
| cmplw 0,r8,r9 |
| beq 1b |
| lwz r8,-8(r6) /* section begin */ |
| lwz r9,-4(r6) /* section end */ |
| subf. r9,r8,r9 |
| beq 1b |
| /* write nops over the section of code */ |
| /* todo: if large section, add a branch at the start of it */ |
| srwi r9,r9,2 |
| mtctr r9 |
| add r8,r8,r3 |
| lis r0,0x60000000@h /* nop */ |
| 3: stw r0,0(r8) |
| andi. r10,r4,CPU_FTR_SPLIT_ID_CACHE@l |
| beq 2f |
| dcbst 0,r8 /* suboptimal, but simpler */ |
| sync |
| icbi 0,r8 |
| 2: addi r8,r8,4 |
| bdnz 3b |
| sync /* additional sync needed on g4 */ |
| isync |
| b 1b |
| |
| /* |
| * call_setup_cpu - call the setup_cpu function for this cpu |
| * r3 = data offset, r24 = cpu number |
| * |
| * Setup function is called with: |
| * r3 = data offset |
| * r4 = ptr to CPU spec (relocated) |
| */ |
| _GLOBAL(call_setup_cpu) |
| addis r4,r3,cur_cpu_spec@ha |
| addi r4,r4,cur_cpu_spec@l |
| lwz r4,0(r4) |
| add r4,r4,r3 |
| lwz r5,CPU_SPEC_SETUP(r4) |
| cmpi 0,r5,0 |
| add r5,r5,r3 |
| beqlr |
| mtctr r5 |
| bctr |
| |
| /* |
| * complement mask on the msr then "or" some values on. |
| * _nmask_and_or_msr(nmask, value_to_or) |
| */ |
| _GLOBAL(_nmask_and_or_msr) |
| mfmsr r0 /* Get current msr */ |
| andc r0,r0,r3 /* And off the bits set in r3 (first parm) */ |
| or r0,r0,r4 /* Or on the bits in r4 (second parm) */ |
| SYNC /* Some chip revs have problems here... */ |
| mtmsr r0 /* Update machine state */ |
| isync |
| blr /* Done */ |
| |
| |
| /* |
| * Flush MMU TLB |
| */ |
| _GLOBAL(_tlbia) |
| #if defined(CONFIG_40x) |
| sync /* Flush to memory before changing mapping */ |
| tlbia |
| isync /* Flush shadow TLB */ |
| #elif defined(CONFIG_44x) |
| li r3,0 |
| sync |
| |
| /* Load high watermark */ |
| lis r4,tlb_44x_hwater@ha |
| lwz r5,tlb_44x_hwater@l(r4) |
| |
| 1: tlbwe r3,r3,PPC44x_TLB_PAGEID |
| addi r3,r3,1 |
| cmpw 0,r3,r5 |
| ble 1b |
| |
| isync |
| #elif defined(CONFIG_FSL_BOOKE) |
| /* Invalidate all entries in TLB0 */ |
| li r3, 0x04 |
| tlbivax 0,3 |
| /* Invalidate all entries in TLB1 */ |
| li r3, 0x0c |
| tlbivax 0,3 |
| /* Invalidate all entries in TLB2 */ |
| li r3, 0x14 |
| tlbivax 0,3 |
| /* Invalidate all entries in TLB3 */ |
| li r3, 0x1c |
| tlbivax 0,3 |
| msync |
| #ifdef CONFIG_SMP |
| tlbsync |
| #endif /* CONFIG_SMP */ |
| #else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */ |
| #if defined(CONFIG_SMP) |
| rlwinm r8,r1,0,0,18 |
| lwz r8,TI_CPU(r8) |
| oris r8,r8,10 |
| mfmsr r10 |
| SYNC |
| rlwinm r0,r10,0,17,15 /* clear bit 16 (MSR_EE) */ |
| rlwinm r0,r0,0,28,26 /* clear DR */ |
| mtmsr r0 |
| SYNC_601 |
| isync |
| lis r9,mmu_hash_lock@h |
| ori r9,r9,mmu_hash_lock@l |
| tophys(r9,r9) |
| 10: lwarx r7,0,r9 |
| cmpwi 0,r7,0 |
| bne- 10b |
| stwcx. r8,0,r9 |
| bne- 10b |
| sync |
| tlbia |
| sync |
| TLBSYNC |
| li r0,0 |
| stw r0,0(r9) /* clear mmu_hash_lock */ |
| mtmsr r10 |
| SYNC_601 |
| isync |
| #else /* CONFIG_SMP */ |
| sync |
| tlbia |
| sync |
| #endif /* CONFIG_SMP */ |
| #endif /* ! defined(CONFIG_40x) */ |
| blr |
| |
| /* |
| * Flush MMU TLB for a particular address |
| */ |
| _GLOBAL(_tlbie) |
| #if defined(CONFIG_40x) |
| tlbsx. r3, 0, r3 |
| bne 10f |
| sync |
| /* There are only 64 TLB entries, so r3 < 64, which means bit 25 is clear. |
| * Since 25 is the V bit in the TLB_TAG, loading this value will invalidate |
| * the TLB entry. */ |
| tlbwe r3, r3, TLB_TAG |
| isync |
| 10: |
| #elif defined(CONFIG_44x) |
| mfspr r4,SPRN_MMUCR |
| mfspr r5,SPRN_PID /* Get PID */ |
| rlwimi r4,r5,0,24,31 /* Set TID */ |
| mtspr SPRN_MMUCR,r4 |
| |
| tlbsx. r3, 0, r3 |
| bne 10f |
| sync |
| /* There are only 64 TLB entries, so r3 < 64, |
| * which means bit 22, is clear. Since 22 is |
| * the V bit in the TLB_PAGEID, loading this |
| * value will invalidate the TLB entry. |
| */ |
| tlbwe r3, r3, PPC44x_TLB_PAGEID |
| isync |
| 10: |
| #elif defined(CONFIG_FSL_BOOKE) |
| rlwinm r4, r3, 0, 0, 19 |
| ori r5, r4, 0x08 /* TLBSEL = 1 */ |
| ori r6, r4, 0x10 /* TLBSEL = 2 */ |
| ori r7, r4, 0x18 /* TLBSEL = 3 */ |
| tlbivax 0, r4 |
| tlbivax 0, r5 |
| tlbivax 0, r6 |
| tlbivax 0, r7 |
| msync |
| #if defined(CONFIG_SMP) |
| tlbsync |
| #endif /* CONFIG_SMP */ |
| #else /* !(CONFIG_40x || CONFIG_44x || CONFIG_FSL_BOOKE) */ |
| #if defined(CONFIG_SMP) |
| rlwinm r8,r1,0,0,18 |
| lwz r8,TI_CPU(r8) |
| oris r8,r8,11 |
| mfmsr r10 |
| SYNC |
| rlwinm r0,r10,0,17,15 /* clear bit 16 (MSR_EE) */ |
| rlwinm r0,r0,0,28,26 /* clear DR */ |
| mtmsr r0 |
| SYNC_601 |
| isync |
| lis r9,mmu_hash_lock@h |
| ori r9,r9,mmu_hash_lock@l |
| tophys(r9,r9) |
| 10: lwarx r7,0,r9 |
| cmpwi 0,r7,0 |
| bne- 10b |
| stwcx. r8,0,r9 |
| bne- 10b |
| eieio |
| tlbie r3 |
| sync |
| TLBSYNC |
| li r0,0 |
| stw r0,0(r9) /* clear mmu_hash_lock */ |
| mtmsr r10 |
| SYNC_601 |
| isync |
| #else /* CONFIG_SMP */ |
| tlbie r3 |
| sync |
| #endif /* CONFIG_SMP */ |
| #endif /* ! CONFIG_40x */ |
| blr |
| |
| /* |
| * Flush instruction cache. |
| * This is a no-op on the 601. |
| */ |
| _GLOBAL(flush_instruction_cache) |
| #if defined(CONFIG_8xx) |
| isync |
| lis r5, IDC_INVALL@h |
| mtspr SPRN_IC_CST, r5 |
| #elif defined(CONFIG_4xx) |
| #ifdef CONFIG_403GCX |
| li r3, 512 |
| mtctr r3 |
| lis r4, KERNELBASE@h |
| 1: iccci 0, r4 |
| addi r4, r4, 16 |
| bdnz 1b |
| #else |
| lis r3, KERNELBASE@h |
| iccci 0,r3 |
| #endif |
| #elif CONFIG_FSL_BOOKE |
| BEGIN_FTR_SECTION |
| mfspr r3,SPRN_L1CSR0 |
| ori r3,r3,L1CSR0_CFI|L1CSR0_CLFC |
| /* msync; isync recommended here */ |
| mtspr SPRN_L1CSR0,r3 |
| isync |
| blr |
| END_FTR_SECTION_IFCLR(CPU_FTR_SPLIT_ID_CACHE) |
| mfspr r3,SPRN_L1CSR1 |
| ori r3,r3,L1CSR1_ICFI|L1CSR1_ICLFR |
| mtspr SPRN_L1CSR1,r3 |
| #else |
| mfspr r3,SPRN_PVR |
| rlwinm r3,r3,16,16,31 |
| cmpwi 0,r3,1 |
| beqlr /* for 601, do nothing */ |
| /* 603/604 processor - use invalidate-all bit in HID0 */ |
| mfspr r3,SPRN_HID0 |
| ori r3,r3,HID0_ICFI |
| mtspr SPRN_HID0,r3 |
| #endif /* CONFIG_8xx/4xx */ |
| isync |
| blr |
| |
| /* |
| * Write any modified data cache blocks out to memory |
| * and invalidate the corresponding instruction cache blocks. |
| * This is a no-op on the 601. |
| * |
| * __flush_icache_range(unsigned long start, unsigned long stop) |
| */ |
| _GLOBAL(__flush_icache_range) |
| BEGIN_FTR_SECTION |
| blr /* for 601, do nothing */ |
| END_FTR_SECTION_IFCLR(CPU_FTR_SPLIT_ID_CACHE) |
| li r5,L1_CACHE_BYTES-1 |
| andc r3,r3,r5 |
| subf r4,r3,r4 |
| add r4,r4,r5 |
| srwi. r4,r4,L1_CACHE_SHIFT |
| beqlr |
| mtctr r4 |
| mr r6,r3 |
| 1: dcbst 0,r3 |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 1b |
| sync /* wait for dcbst's to get to ram */ |
| mtctr r4 |
| 2: icbi 0,r6 |
| addi r6,r6,L1_CACHE_BYTES |
| bdnz 2b |
| sync /* additional sync needed on g4 */ |
| isync |
| blr |
| /* |
| * Write any modified data cache blocks out to memory. |
| * Does not invalidate the corresponding cache lines (especially for |
| * any corresponding instruction cache). |
| * |
| * clean_dcache_range(unsigned long start, unsigned long stop) |
| */ |
| _GLOBAL(clean_dcache_range) |
| li r5,L1_CACHE_BYTES-1 |
| andc r3,r3,r5 |
| subf r4,r3,r4 |
| add r4,r4,r5 |
| srwi. r4,r4,L1_CACHE_SHIFT |
| beqlr |
| mtctr r4 |
| |
| 1: dcbst 0,r3 |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 1b |
| sync /* wait for dcbst's to get to ram */ |
| blr |
| |
| /* |
| * Write any modified data cache blocks out to memory and invalidate them. |
| * Does not invalidate the corresponding instruction cache blocks. |
| * |
| * flush_dcache_range(unsigned long start, unsigned long stop) |
| */ |
| _GLOBAL(flush_dcache_range) |
| li r5,L1_CACHE_BYTES-1 |
| andc r3,r3,r5 |
| subf r4,r3,r4 |
| add r4,r4,r5 |
| srwi. r4,r4,L1_CACHE_SHIFT |
| beqlr |
| mtctr r4 |
| |
| 1: dcbf 0,r3 |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 1b |
| sync /* wait for dcbst's to get to ram */ |
| blr |
| |
| /* |
| * Like above, but invalidate the D-cache. This is used by the 8xx |
| * to invalidate the cache so the PPC core doesn't get stale data |
| * from the CPM (no cache snooping here :-). |
| * |
| * invalidate_dcache_range(unsigned long start, unsigned long stop) |
| */ |
| _GLOBAL(invalidate_dcache_range) |
| li r5,L1_CACHE_BYTES-1 |
| andc r3,r3,r5 |
| subf r4,r3,r4 |
| add r4,r4,r5 |
| srwi. r4,r4,L1_CACHE_SHIFT |
| beqlr |
| mtctr r4 |
| |
| 1: dcbi 0,r3 |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 1b |
| sync /* wait for dcbi's to get to ram */ |
| blr |
| |
| #ifdef CONFIG_NOT_COHERENT_CACHE |
| /* |
| * 40x cores have 8K or 16K dcache and 32 byte line size. |
| * 44x has a 32K dcache and 32 byte line size. |
| * 8xx has 1, 2, 4, 8K variants. |
| * For now, cover the worst case of the 44x. |
| * Must be called with external interrupts disabled. |
| */ |
| #define CACHE_NWAYS 64 |
| #define CACHE_NLINES 16 |
| |
| _GLOBAL(flush_dcache_all) |
| li r4, (2 * CACHE_NWAYS * CACHE_NLINES) |
| mtctr r4 |
| lis r5, KERNELBASE@h |
| 1: lwz r3, 0(r5) /* Load one word from every line */ |
| addi r5, r5, L1_CACHE_BYTES |
| bdnz 1b |
| blr |
| #endif /* CONFIG_NOT_COHERENT_CACHE */ |
| |
| /* |
| * Flush a particular page from the data cache to RAM. |
| * Note: this is necessary because the instruction cache does *not* |
| * snoop from the data cache. |
| * This is a no-op on the 601 which has a unified cache. |
| * |
| * void __flush_dcache_icache(void *page) |
| */ |
| _GLOBAL(__flush_dcache_icache) |
| BEGIN_FTR_SECTION |
| blr /* for 601, do nothing */ |
| END_FTR_SECTION_IFCLR(CPU_FTR_SPLIT_ID_CACHE) |
| rlwinm r3,r3,0,0,19 /* Get page base address */ |
| li r4,4096/L1_CACHE_BYTES /* Number of lines in a page */ |
| mtctr r4 |
| mr r6,r3 |
| 0: dcbst 0,r3 /* Write line to ram */ |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 0b |
| sync |
| mtctr r4 |
| 1: icbi 0,r6 |
| addi r6,r6,L1_CACHE_BYTES |
| bdnz 1b |
| sync |
| isync |
| blr |
| |
| /* |
| * Flush a particular page from the data cache to RAM, identified |
| * by its physical address. We turn off the MMU so we can just use |
| * the physical address (this may be a highmem page without a kernel |
| * mapping). |
| * |
| * void __flush_dcache_icache_phys(unsigned long physaddr) |
| */ |
| _GLOBAL(__flush_dcache_icache_phys) |
| BEGIN_FTR_SECTION |
| blr /* for 601, do nothing */ |
| END_FTR_SECTION_IFCLR(CPU_FTR_SPLIT_ID_CACHE) |
| mfmsr r10 |
| rlwinm r0,r10,0,28,26 /* clear DR */ |
| mtmsr r0 |
| isync |
| rlwinm r3,r3,0,0,19 /* Get page base address */ |
| li r4,4096/L1_CACHE_BYTES /* Number of lines in a page */ |
| mtctr r4 |
| mr r6,r3 |
| 0: dcbst 0,r3 /* Write line to ram */ |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 0b |
| sync |
| mtctr r4 |
| 1: icbi 0,r6 |
| addi r6,r6,L1_CACHE_BYTES |
| bdnz 1b |
| sync |
| mtmsr r10 /* restore DR */ |
| isync |
| blr |
| |
| /* |
| * Clear pages using the dcbz instruction, which doesn't cause any |
| * memory traffic (except to write out any cache lines which get |
| * displaced). This only works on cacheable memory. |
| * |
| * void clear_pages(void *page, int order) ; |
| */ |
| _GLOBAL(clear_pages) |
| li r0,4096/L1_CACHE_BYTES |
| slw r0,r0,r4 |
| mtctr r0 |
| #ifdef CONFIG_8xx |
| li r4, 0 |
| 1: stw r4, 0(r3) |
| stw r4, 4(r3) |
| stw r4, 8(r3) |
| stw r4, 12(r3) |
| #else |
| 1: dcbz 0,r3 |
| #endif |
| addi r3,r3,L1_CACHE_BYTES |
| bdnz 1b |
| blr |
| |
| /* |
| * Copy a whole page. We use the dcbz instruction on the destination |
| * to reduce memory traffic (it eliminates the unnecessary reads of |
| * the destination into cache). This requires that the destination |
| * is cacheable. |
| */ |
| #define COPY_16_BYTES \ |
| lwz r6,4(r4); \ |
| lwz r7,8(r4); \ |
| lwz r8,12(r4); \ |
| lwzu r9,16(r4); \ |
| stw r6,4(r3); \ |
| stw r7,8(r3); \ |
| stw r8,12(r3); \ |
| stwu r9,16(r3) |
| |
| _GLOBAL(copy_page) |
| addi r3,r3,-4 |
| addi r4,r4,-4 |
| |
| #ifdef CONFIG_8xx |
| /* don't use prefetch on 8xx */ |
| li r0,4096/L1_CACHE_BYTES |
| mtctr r0 |
| 1: COPY_16_BYTES |
| bdnz 1b |
| blr |
| |
| #else /* not 8xx, we can prefetch */ |
| li r5,4 |
| |
| #if MAX_COPY_PREFETCH > 1 |
| li r0,MAX_COPY_PREFETCH |
| li r11,4 |
| mtctr r0 |
| 11: dcbt r11,r4 |
| addi r11,r11,L1_CACHE_BYTES |
| bdnz 11b |
| #else /* MAX_COPY_PREFETCH == 1 */ |
| dcbt r5,r4 |
| li r11,L1_CACHE_BYTES+4 |
| #endif /* MAX_COPY_PREFETCH */ |
| li r0,4096/L1_CACHE_BYTES - MAX_COPY_PREFETCH |
| crclr 4*cr0+eq |
| 2: |
| mtctr r0 |
| 1: |
| dcbt r11,r4 |
| dcbz r5,r3 |
| COPY_16_BYTES |
| #if L1_CACHE_BYTES >= 32 |
| COPY_16_BYTES |
| #if L1_CACHE_BYTES >= 64 |
| COPY_16_BYTES |
| COPY_16_BYTES |
| #if L1_CACHE_BYTES >= 128 |
| COPY_16_BYTES |
| COPY_16_BYTES |
| COPY_16_BYTES |
| COPY_16_BYTES |
| #endif |
| #endif |
| #endif |
| bdnz 1b |
| beqlr |
| crnot 4*cr0+eq,4*cr0+eq |
| li r0,MAX_COPY_PREFETCH |
| li r11,4 |
| b 2b |
| #endif /* CONFIG_8xx */ |
| |
| /* |
| * void atomic_clear_mask(atomic_t mask, atomic_t *addr) |
| * void atomic_set_mask(atomic_t mask, atomic_t *addr); |
| */ |
| _GLOBAL(atomic_clear_mask) |
| 10: lwarx r5,0,r4 |
| andc r5,r5,r3 |
| PPC405_ERR77(0,r4) |
| stwcx. r5,0,r4 |
| bne- 10b |
| blr |
| _GLOBAL(atomic_set_mask) |
| 10: lwarx r5,0,r4 |
| or r5,r5,r3 |
| PPC405_ERR77(0,r4) |
| stwcx. r5,0,r4 |
| bne- 10b |
| blr |
| |
| /* |
| * I/O string operations |
| * |
| * insb(port, buf, len) |
| * outsb(port, buf, len) |
| * insw(port, buf, len) |
| * outsw(port, buf, len) |
| * insl(port, buf, len) |
| * outsl(port, buf, len) |
| * insw_ns(port, buf, len) |
| * outsw_ns(port, buf, len) |
| * insl_ns(port, buf, len) |
| * outsl_ns(port, buf, len) |
| * |
| * The *_ns versions don't do byte-swapping. |
| */ |
| _GLOBAL(_insb) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,1 |
| blelr- |
| 00: lbz r5,0(r3) |
| 01: eieio |
| 02: stbu r5,1(r4) |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(_outsb) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,1 |
| blelr- |
| 00: lbzu r5,1(r4) |
| 01: stb r5,0(r3) |
| 02: eieio |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(_insw) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,2 |
| blelr- |
| 00: lhbrx r5,0,r3 |
| 01: eieio |
| 02: sthu r5,2(r4) |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(_outsw) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,2 |
| blelr- |
| 00: lhzu r5,2(r4) |
| 01: eieio |
| 02: sthbrx r5,0,r3 |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(_insl) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,4 |
| blelr- |
| 00: lwbrx r5,0,r3 |
| 01: eieio |
| 02: stwu r5,4(r4) |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(_outsl) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,4 |
| blelr- |
| 00: lwzu r5,4(r4) |
| 01: stwbrx r5,0,r3 |
| 02: eieio |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(__ide_mm_insw) |
| _GLOBAL(_insw_ns) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,2 |
| blelr- |
| 00: lhz r5,0(r3) |
| 01: eieio |
| 02: sthu r5,2(r4) |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(__ide_mm_outsw) |
| _GLOBAL(_outsw_ns) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,2 |
| blelr- |
| 00: lhzu r5,2(r4) |
| 01: sth r5,0(r3) |
| 02: eieio |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(__ide_mm_insl) |
| _GLOBAL(_insl_ns) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,4 |
| blelr- |
| 00: lwz r5,0(r3) |
| 01: eieio |
| 02: stwu r5,4(r4) |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| _GLOBAL(__ide_mm_outsl) |
| _GLOBAL(_outsl_ns) |
| cmpwi 0,r5,0 |
| mtctr r5 |
| subi r4,r4,4 |
| blelr- |
| 00: lwzu r5,4(r4) |
| 01: stw r5,0(r3) |
| 02: eieio |
| ISYNC_8xx |
| .section .fixup,"ax" |
| 03: blr |
| .text |
| .section __ex_table, "a" |
| .align 2 |
| .long 00b, 03b |
| .long 01b, 03b |
| .long 02b, 03b |
| .text |
| bdnz 00b |
| blr |
| |
| /* |
| * Extended precision shifts. |
| * |
| * Updated to be valid for shift counts from 0 to 63 inclusive. |
| * -- Gabriel |
| * |
| * R3/R4 has 64 bit value |
| * R5 has shift count |
| * result in R3/R4 |
| * |
| * ashrdi3: arithmetic right shift (sign propagation) |
| * lshrdi3: logical right shift |
| * ashldi3: left shift |
| */ |
| _GLOBAL(__ashrdi3) |
| subfic r6,r5,32 |
| srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count |
| addi r7,r5,32 # could be xori, or addi with -32 |
| slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) |
| rlwinm r8,r7,0,32 # t3 = (count < 32) ? 32 : 0 |
| sraw r7,r3,r7 # t2 = MSW >> (count-32) |
| or r4,r4,r6 # LSW |= t1 |
| slw r7,r7,r8 # t2 = (count < 32) ? 0 : t2 |
| sraw r3,r3,r5 # MSW = MSW >> count |
| or r4,r4,r7 # LSW |= t2 |
| blr |
| |
| _GLOBAL(__ashldi3) |
| subfic r6,r5,32 |
| slw r3,r3,r5 # MSW = count > 31 ? 0 : MSW << count |
| addi r7,r5,32 # could be xori, or addi with -32 |
| srw r6,r4,r6 # t1 = count > 31 ? 0 : LSW >> (32-count) |
| slw r7,r4,r7 # t2 = count < 32 ? 0 : LSW << (count-32) |
| or r3,r3,r6 # MSW |= t1 |
| slw r4,r4,r5 # LSW = LSW << count |
| or r3,r3,r7 # MSW |= t2 |
| blr |
| |
| _GLOBAL(__lshrdi3) |
| subfic r6,r5,32 |
| srw r4,r4,r5 # LSW = count > 31 ? 0 : LSW >> count |
| addi r7,r5,32 # could be xori, or addi with -32 |
| slw r6,r3,r6 # t1 = count > 31 ? 0 : MSW << (32-count) |
| srw r7,r3,r7 # t2 = count < 32 ? 0 : MSW >> (count-32) |
| or r4,r4,r6 # LSW |= t1 |
| srw r3,r3,r5 # MSW = MSW >> count |
| or r4,r4,r7 # LSW |= t2 |
| blr |
| |
| _GLOBAL(abs) |
| srawi r4,r3,31 |
| xor r3,r3,r4 |
| sub r3,r3,r4 |
| blr |
| |
| _GLOBAL(_get_SP) |
| mr r3,r1 /* Close enough */ |
| blr |
| |
| /* |
| * Create a kernel thread |
| * kernel_thread(fn, arg, flags) |
| */ |
| _GLOBAL(kernel_thread) |
| stwu r1,-16(r1) |
| stw r30,8(r1) |
| stw r31,12(r1) |
| mr r30,r3 /* function */ |
| mr r31,r4 /* argument */ |
| ori r3,r5,CLONE_VM /* flags */ |
| oris r3,r3,CLONE_UNTRACED>>16 |
| li r4,0 /* new sp (unused) */ |
| li r0,__NR_clone |
| sc |
| cmpwi 0,r3,0 /* parent or child? */ |
| bne 1f /* return if parent */ |
| li r0,0 /* make top-level stack frame */ |
| stwu r0,-16(r1) |
| mtlr r30 /* fn addr in lr */ |
| mr r3,r31 /* load arg and call fn */ |
| PPC440EP_ERR42 |
| blrl |
| li r0,__NR_exit /* exit if function returns */ |
| li r3,0 |
| sc |
| 1: lwz r30,8(r1) |
| lwz r31,12(r1) |
| addi r1,r1,16 |
| blr |
| |
| /* |
| * This routine is just here to keep GCC happy - sigh... |
| */ |
| _GLOBAL(__main) |
| blr |
| |
| #define SYSCALL(name) \ |
| _GLOBAL(name) \ |
| li r0,__NR_##name; \ |
| sc; \ |
| bnslr; \ |
| lis r4,errno@ha; \ |
| stw r3,errno@l(r4); \ |
| li r3,-1; \ |
| blr |
| |
| SYSCALL(execve) |
