diff options
Diffstat (limited to 'arch/tile/kernel/head_32.S')
| -rw-r--r-- | arch/tile/kernel/head_32.S | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/arch/tile/kernel/head_32.S b/arch/tile/kernel/head_32.S deleted file mode 100644 index 8d5b40f..0000000 --- a/arch/tile/kernel/head_32.S +++ /dev/null @@ -1,183 +0,0 @@ -/* - * Copyright 2010 Tilera Corporation. All Rights Reserved. - * - * 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, version 2. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or - * NON INFRINGEMENT. See the GNU General Public License for - * more details. - * - * TILE startup code. - */ - -#include <linux/linkage.h> -#include <linux/init.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/thread_info.h> -#include <asm/processor.h> -#include <asm/asm-offsets.h> -#include <hv/hypervisor.h> -#include <arch/chip.h> -#include <arch/spr_def.h> - -/* - * This module contains the entry code for kernel images. It performs the - * minimal setup needed to call the generic C routines. - */ - - __HEAD -ENTRY(_start) - /* Notify the hypervisor of what version of the API we want */ - { - movei r1, TILE_CHIP - movei r2, TILE_CHIP_REV - } - { - moveli r0, _HV_VERSION_OLD_HV_INIT - jal _hv_init - } - /* Get a reasonable default ASID in r0 */ - { - move r0, zero - jal _hv_inquire_asid - } - /* Install the default page table */ - { - moveli r6, lo16(swapper_pgprot - PAGE_OFFSET) - move r4, r0 /* use starting ASID of range for this page table */ - } - { - moveli r0, lo16(swapper_pg_dir - PAGE_OFFSET) - auli r6, r6, ha16(swapper_pgprot - PAGE_OFFSET) - } - { - lw r2, r6 - addi r6, r6, 4 - } - { - lw r3, r6 - auli r0, r0, ha16(swapper_pg_dir - PAGE_OFFSET) - } - { - finv r6 - move r1, zero /* high 32 bits of CPA is zero */ - } - { - moveli lr, lo16(1f) - moveli r5, CTX_PAGE_FLAG - } - { - auli lr, lr, ha16(1f) - j _hv_install_context - } -1: - - /* Get our processor number and save it away in SAVE_K_0. */ - jal _hv_inquire_topology - mulll_uu r4, r1, r2 /* r1 == y, r2 == width */ - add r4, r4, r0 /* r0 == x, so r4 == cpu == y*width + x */ - -#ifdef CONFIG_SMP - /* - * Load up our per-cpu offset. When the first (master) tile - * boots, this value is still zero, so we will load boot_pc - * with start_kernel, and boot_sp at the top of init_stack. - * The master tile initializes the per-cpu offset array, so that - * when subsequent (secondary) tiles boot, they will instead load - * from their per-cpu versions of boot_sp and boot_pc. - */ - moveli r5, lo16(__per_cpu_offset) - auli r5, r5, ha16(__per_cpu_offset) - s2a r5, r4, r5 - lw r5, r5 - bnz r5, 1f - - /* - * Save the width and height to the smp_topology variable - * for later use. - */ - moveli r0, lo16(smp_topology + HV_TOPOLOGY_WIDTH_OFFSET) - auli r0, r0, ha16(smp_topology + HV_TOPOLOGY_WIDTH_OFFSET) - { - sw r0, r2 - addi r0, r0, (HV_TOPOLOGY_HEIGHT_OFFSET - HV_TOPOLOGY_WIDTH_OFFSET) - } - sw r0, r3 -1: -#else - move r5, zero -#endif - - /* Load and go with the correct pc and sp. */ - { - addli r1, r5, lo16(boot_sp) - addli r0, r5, lo16(boot_pc) - } - { - auli r1, r1, ha16(boot_sp) - auli r0, r0, ha16(boot_pc) - } - lw r0, r0 - lw sp, r1 - or r4, sp, r4 - mtspr SPR_SYSTEM_SAVE_K_0, r4 /* save ksp0 + cpu */ - { - move lr, zero /* stop backtraces in the called function */ - jr r0 - } - ENDPROC(_start) - -__PAGE_ALIGNED_BSS - .align PAGE_SIZE -ENTRY(empty_zero_page) - .fill PAGE_SIZE,1,0 - END(empty_zero_page) - - .macro PTE va, cpa, bits1, no_org=0 - .ifeq \no_org - .org swapper_pg_dir + PGD_INDEX(\va) * HV_PTE_SIZE - .endif - .word HV_PTE_PAGE | HV_PTE_DIRTY | HV_PTE_PRESENT | HV_PTE_ACCESSED | \ - (HV_PTE_MODE_CACHE_NO_L3 << HV_PTE_INDEX_MODE) - .word (\bits1) | (HV_CPA_TO_PTFN(\cpa) << (HV_PTE_INDEX_PTFN - 32)) - .endm - -__PAGE_ALIGNED_DATA - .align PAGE_SIZE -ENTRY(swapper_pg_dir) - /* - * All data pages from PAGE_OFFSET to MEM_USER_INTRPT are mapped as - * VA = PA + PAGE_OFFSET. We remap things with more precise access - * permissions and more respect for size of RAM later. - */ - .set addr, 0 - .rept (MEM_USER_INTRPT - PAGE_OFFSET) >> PGDIR_SHIFT - PTE addr + PAGE_OFFSET, addr, (1 << (HV_PTE_INDEX_READABLE - 32)) | \ - (1 << (HV_PTE_INDEX_WRITABLE - 32)) - .set addr, addr + PGDIR_SIZE - .endr - - /* The true text VAs are mapped as VA = PA + MEM_SV_START */ - PTE MEM_SV_START, 0, (1 << (HV_PTE_INDEX_READABLE - 32)) | \ - (1 << (HV_PTE_INDEX_EXECUTABLE - 32)) - .org swapper_pg_dir + PGDIR_SIZE - END(swapper_pg_dir) - - /* - * Isolate swapper_pgprot to its own cache line, since each cpu - * starting up will read it using VA-is-PA and local homing. - * This would otherwise likely conflict with other data on the cache - * line, once we have set its permanent home in the page tables. - */ - __INITDATA - .align CHIP_L2_LINE_SIZE() -ENTRY(swapper_pgprot) - PTE 0, 0, (1 << (HV_PTE_INDEX_READABLE - 32)) | \ - (1 << (HV_PTE_INDEX_WRITABLE - 32)), 1 - .align CHIP_L2_LINE_SIZE() - END(swapper_pgprot) |
