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Diffstat (limited to 'arch/sparc64/kernel/head.S')
| -rw-r--r-- | arch/sparc64/kernel/head.S | 577 |
1 files changed, 0 insertions, 577 deletions
diff --git a/arch/sparc64/kernel/head.S b/arch/sparc64/kernel/head.S deleted file mode 100644 index b49dcd4504b..00000000000 --- a/arch/sparc64/kernel/head.S +++ /dev/null @@ -1,577 +0,0 @@ -/* $Id: head.S,v 1.87 2002/02/09 19:49:31 davem Exp $ - * head.S: Initial boot code for the Sparc64 port of Linux. - * - * Copyright (C) 1996,1997 David S. Miller (davem@caip.rutgers.edu) - * Copyright (C) 1996 David Sitsky (David.Sitsky@anu.edu.au) - * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) - * Copyright (C) 1997 Miguel de Icaza (miguel@nuclecu.unam.mx) - */ - -#include <linux/config.h> -#include <linux/version.h> -#include <linux/errno.h> -#include <asm/thread_info.h> -#include <asm/asi.h> -#include <asm/pstate.h> -#include <asm/ptrace.h> -#include <asm/spitfire.h> -#include <asm/page.h> -#include <asm/pgtable.h> -#include <asm/errno.h> -#include <asm/signal.h> -#include <asm/processor.h> -#include <asm/lsu.h> -#include <asm/dcr.h> -#include <asm/dcu.h> -#include <asm/head.h> -#include <asm/ttable.h> -#include <asm/mmu.h> - -/* This section from from _start to sparc64_boot_end should fit into - * 0x0000000000404000 to 0x0000000000408000. - */ - .text - .globl start, _start, stext, _stext -_start: -start: -_stext: -stext: -! 0x0000000000404000 - b sparc64_boot - flushw /* Flush register file. */ - -/* This stuff has to be in sync with SILO and other potential boot loaders - * Fields should be kept upward compatible and whenever any change is made, - * HdrS version should be incremented. - */ - .global root_flags, ram_flags, root_dev - .global sparc_ramdisk_image, sparc_ramdisk_size - .global sparc_ramdisk_image64 - - .ascii "HdrS" - .word LINUX_VERSION_CODE - - /* History: - * - * 0x0300 : Supports being located at other than 0x4000 - * 0x0202 : Supports kernel params string - * 0x0201 : Supports reboot_command - */ - .half 0x0301 /* HdrS version */ - -root_flags: - .half 1 -root_dev: - .half 0 -ram_flags: - .half 0 -sparc_ramdisk_image: - .word 0 -sparc_ramdisk_size: - .word 0 - .xword reboot_command - .xword bootstr_info -sparc_ramdisk_image64: - .xword 0 - .word _end - - /* PROM cif handler code address is in %o4. */ -sparc64_boot: -1: rd %pc, %g7 - set 1b, %g1 - cmp %g1, %g7 - be,pn %xcc, sparc64_boot_after_remap - mov %o4, %l7 - - /* We need to remap the kernel. Use position independant - * code to remap us to KERNBASE. - * - * SILO can invoke us with 32-bit address masking enabled, - * so make sure that's clear. - */ - rdpr %pstate, %g1 - andn %g1, PSTATE_AM, %g1 - wrpr %g1, 0x0, %pstate - ba,a,pt %xcc, 1f - - .globl prom_finddev_name, prom_chosen_path - .globl prom_getprop_name, prom_mmu_name - .globl prom_callmethod_name, prom_translate_name - .globl prom_map_name, prom_unmap_name, prom_mmu_ihandle_cache - .globl prom_boot_mapped_pc, prom_boot_mapping_mode - .globl prom_boot_mapping_phys_high, prom_boot_mapping_phys_low -prom_finddev_name: - .asciz "finddevice" -prom_chosen_path: - .asciz "/chosen" -prom_getprop_name: - .asciz "getprop" -prom_mmu_name: - .asciz "mmu" -prom_callmethod_name: - .asciz "call-method" -prom_translate_name: - .asciz "translate" -prom_map_name: - .asciz "map" -prom_unmap_name: - .asciz "unmap" - .align 4 -prom_mmu_ihandle_cache: - .word 0 -prom_boot_mapped_pc: - .word 0 -prom_boot_mapping_mode: - .word 0 - .align 8 -prom_boot_mapping_phys_high: - .xword 0 -prom_boot_mapping_phys_low: - .xword 0 -1: - rd %pc, %l0 - mov (1b - prom_finddev_name), %l1 - mov (1b - prom_chosen_path), %l2 - mov (1b - prom_boot_mapped_pc), %l3 - sub %l0, %l1, %l1 - sub %l0, %l2, %l2 - sub %l0, %l3, %l3 - stw %l0, [%l3] - sub %sp, (192 + 128), %sp - - /* chosen_node = prom_finddevice("/chosen") */ - stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "finddevice" - mov 1, %l3 - stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 1 - stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 - stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1, "/chosen" - stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 - call %l7 - add %sp, (2047 + 128), %o0 ! argument array - - ldx [%sp + 2047 + 128 + 0x20], %l4 ! chosen device node - - mov (1b - prom_getprop_name), %l1 - mov (1b - prom_mmu_name), %l2 - mov (1b - prom_mmu_ihandle_cache), %l5 - sub %l0, %l1, %l1 - sub %l0, %l2, %l2 - sub %l0, %l5, %l5 - - /* prom_mmu_ihandle_cache = prom_getint(chosen_node, "mmu") */ - stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "getprop" - mov 4, %l3 - stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 4 - mov 1, %l3 - stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 - stx %l4, [%sp + 2047 + 128 + 0x18] ! arg1, chosen_node - stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "mmu" - stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_mmu_ihandle_cache - mov 4, %l3 - stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, sizeof(arg3) - stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 - call %l7 - add %sp, (2047 + 128), %o0 ! argument array - - mov (1b - prom_callmethod_name), %l1 - mov (1b - prom_translate_name), %l2 - sub %l0, %l1, %l1 - sub %l0, %l2, %l2 - lduw [%l5], %l5 ! prom_mmu_ihandle_cache - - stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "call-method" - mov 3, %l3 - stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 3 - mov 5, %l3 - stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 5 - stx %l2, [%sp + 2047 + 128 + 0x18] ! arg1: "translate" - stx %l5, [%sp + 2047 + 128 + 0x20] ! arg2: prom_mmu_ihandle_cache - /* PAGE align */ - srlx %l0, 13, %l3 - sllx %l3, 13, %l3 - stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: vaddr, our PC - stx %g0, [%sp + 2047 + 128 + 0x30] ! res1 - stx %g0, [%sp + 2047 + 128 + 0x38] ! res2 - stx %g0, [%sp + 2047 + 128 + 0x40] ! res3 - stx %g0, [%sp + 2047 + 128 + 0x48] ! res4 - stx %g0, [%sp + 2047 + 128 + 0x50] ! res5 - call %l7 - add %sp, (2047 + 128), %o0 ! argument array - - ldx [%sp + 2047 + 128 + 0x40], %l1 ! translation mode - mov (1b - prom_boot_mapping_mode), %l4 - sub %l0, %l4, %l4 - stw %l1, [%l4] - mov (1b - prom_boot_mapping_phys_high), %l4 - sub %l0, %l4, %l4 - ldx [%sp + 2047 + 128 + 0x48], %l2 ! physaddr high - stx %l2, [%l4 + 0x0] - ldx [%sp + 2047 + 128 + 0x50], %l3 ! physaddr low - /* 4MB align */ - srlx %l3, 22, %l3 - sllx %l3, 22, %l3 - stx %l3, [%l4 + 0x8] - - /* Leave service as-is, "call-method" */ - mov 7, %l3 - stx %l3, [%sp + 2047 + 128 + 0x08] ! num_args, 7 - mov 1, %l3 - stx %l3, [%sp + 2047 + 128 + 0x10] ! num_rets, 1 - mov (1b - prom_map_name), %l3 - sub %l0, %l3, %l3 - stx %l3, [%sp + 2047 + 128 + 0x18] ! arg1: "map" - /* Leave arg2 as-is, prom_mmu_ihandle_cache */ - mov -1, %l3 - stx %l3, [%sp + 2047 + 128 + 0x28] ! arg3: mode (-1 default) - sethi %hi(8 * 1024 * 1024), %l3 - stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4: size (8MB) - sethi %hi(KERNBASE), %l3 - stx %l3, [%sp + 2047 + 128 + 0x38] ! arg5: vaddr (KERNBASE) - stx %g0, [%sp + 2047 + 128 + 0x40] ! arg6: empty - mov (1b - prom_boot_mapping_phys_low), %l3 - sub %l0, %l3, %l3 - ldx [%l3], %l3 - stx %l3, [%sp + 2047 + 128 + 0x48] ! arg7: phys addr - call %l7 - add %sp, (2047 + 128), %o0 ! argument array - - add %sp, (192 + 128), %sp - -sparc64_boot_after_remap: - BRANCH_IF_CHEETAH_BASE(g1,g7,cheetah_boot) - BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,cheetah_plus_boot) - ba,pt %xcc, spitfire_boot - nop - -cheetah_plus_boot: - /* Preserve OBP chosen DCU and DCR register settings. */ - ba,pt %xcc, cheetah_generic_boot - nop - -cheetah_boot: - mov DCR_BPE | DCR_RPE | DCR_SI | DCR_IFPOE | DCR_MS, %g1 - wr %g1, %asr18 - - sethi %uhi(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g7 - or %g7, %ulo(DCU_ME|DCU_RE|DCU_HPE|DCU_SPE|DCU_SL|DCU_WE), %g7 - sllx %g7, 32, %g7 - or %g7, DCU_DM | DCU_IM | DCU_DC | DCU_IC, %g7 - stxa %g7, [%g0] ASI_DCU_CONTROL_REG - membar #Sync - -cheetah_generic_boot: - mov TSB_EXTENSION_P, %g3 - stxa %g0, [%g3] ASI_DMMU - stxa %g0, [%g3] ASI_IMMU - membar #Sync - - mov TSB_EXTENSION_S, %g3 - stxa %g0, [%g3] ASI_DMMU - membar #Sync - - mov TSB_EXTENSION_N, %g3 - stxa %g0, [%g3] ASI_DMMU - stxa %g0, [%g3] ASI_IMMU - membar #Sync - - ba,a,pt %xcc, jump_to_sun4u_init - -spitfire_boot: - /* Typically PROM has already enabled both MMU's and both on-chip - * caches, but we do it here anyway just to be paranoid. - */ - mov (LSU_CONTROL_IC|LSU_CONTROL_DC|LSU_CONTROL_IM|LSU_CONTROL_DM), %g1 - stxa %g1, [%g0] ASI_LSU_CONTROL - membar #Sync - -jump_to_sun4u_init: - /* - * Make sure we are in privileged mode, have address masking, - * using the ordinary globals and have enabled floating - * point. - * - * Again, typically PROM has left %pil at 13 or similar, and - * (PSTATE_PRIV | PSTATE_PEF | PSTATE_IE) in %pstate. - */ - wrpr %g0, (PSTATE_PRIV|PSTATE_PEF|PSTATE_IE), %pstate - wr %g0, 0, %fprs - - set sun4u_init, %g2 - jmpl %g2 + %g0, %g0 - nop - -sun4u_init: - /* Set ctx 0 */ - mov PRIMARY_CONTEXT, %g7 - stxa %g0, [%g7] ASI_DMMU - membar #Sync - - mov SECONDARY_CONTEXT, %g7 - stxa %g0, [%g7] ASI_DMMU - membar #Sync - - BRANCH_IF_ANY_CHEETAH(g1,g7,cheetah_tlb_fixup) - - ba,pt %xcc, spitfire_tlb_fixup - nop - -cheetah_tlb_fixup: - mov 2, %g2 /* Set TLB type to cheetah+. */ - BRANCH_IF_CHEETAH_PLUS_OR_FOLLOWON(g1,g7,1f) - - mov 1, %g2 /* Set TLB type to cheetah. */ - -1: sethi %hi(tlb_type), %g1 - stw %g2, [%g1 + %lo(tlb_type)] - - /* Patch copy/page operations to cheetah optimized versions. */ - call cheetah_patch_copyops - nop - call cheetah_patch_copy_page - nop - call cheetah_patch_cachetlbops - nop - - ba,pt %xcc, tlb_fixup_done - nop - -spitfire_tlb_fixup: - /* Set TLB type to spitfire. */ - mov 0, %g2 - sethi %hi(tlb_type), %g1 - stw %g2, [%g1 + %lo(tlb_type)] - -tlb_fixup_done: - sethi %hi(init_thread_union), %g6 - or %g6, %lo(init_thread_union), %g6 - ldx [%g6 + TI_TASK], %g4 - mov %sp, %l6 - mov %o4, %l7 - - wr %g0, ASI_P, %asi - mov 1, %g1 - sllx %g1, THREAD_SHIFT, %g1 - sub %g1, (STACKFRAME_SZ + STACK_BIAS), %g1 - add %g6, %g1, %sp - mov 0, %fp - - /* Set per-cpu pointer initially to zero, this makes - * the boot-cpu use the in-kernel-image per-cpu areas - * before setup_per_cpu_area() is invoked. - */ - clr %g5 - - wrpr %g0, 0, %wstate - wrpr %g0, 0x0, %tl - - /* Clear the bss */ - sethi %hi(__bss_start), %o0 - or %o0, %lo(__bss_start), %o0 - sethi %hi(_end), %o1 - or %o1, %lo(_end), %o1 - call __bzero - sub %o1, %o0, %o1 - - mov %l6, %o1 ! OpenPROM stack - call prom_init - mov %l7, %o0 ! OpenPROM cif handler - - /* Off we go.... */ - call start_kernel - nop - /* Not reached... */ - - /* This is meant to allow the sharing of this code between - * boot processor invocation (via setup_tba() below) and - * secondary processor startup (via trampoline.S). The - * former does use this code, the latter does not yet due - * to some complexities. That should be fixed up at some - * point. - * - * There used to be enormous complexity wrt. transferring - * over from the firwmare's trap table to the Linux kernel's. - * For example, there was a chicken & egg problem wrt. building - * the OBP page tables, yet needing to be on the Linux kernel - * trap table (to translate PAGE_OFFSET addresses) in order to - * do that. - * - * We now handle OBP tlb misses differently, via linear lookups - * into the prom_trans[] array. So that specific problem no - * longer exists. Yet, unfortunately there are still some issues - * preventing trampoline.S from using this code... ho hum. - */ - .globl setup_trap_table -setup_trap_table: - save %sp, -192, %sp - - /* Force interrupts to be disabled. */ - rdpr %pstate, %o1 - andn %o1, PSTATE_IE, %o1 - wrpr %o1, 0x0, %pstate - wrpr %g0, 15, %pil - - /* Make the firmware call to jump over to the Linux trap table. */ - call prom_set_trap_table - sethi %hi(sparc64_ttable_tl0), %o0 - - /* Start using proper page size encodings in ctx register. */ - sethi %hi(sparc64_kern_pri_context), %g3 - ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 - mov PRIMARY_CONTEXT, %g1 - stxa %g2, [%g1] ASI_DMMU - membar #Sync - - /* The Linux trap handlers expect various trap global registers - * to be setup with some fixed values. So here we set these - * up very carefully. These globals are: - * - * Alternate Globals (PSTATE_AG): - * - * %g6 --> current_thread_info() - * - * MMU Globals (PSTATE_MG): - * - * %g1 --> TLB_SFSR - * %g2 --> ((_PAGE_VALID | _PAGE_SZ4MB | - * _PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W) - * ^ 0xfffff80000000000) - * (this %g2 value is used for computing the PAGE_OFFSET kernel - * TLB entries quickly, the virtual address of the fault XOR'd - * with this %g2 value is the PTE to load into the TLB) - * %g3 --> VPTE_BASE_CHEETAH or VPTE_BASE_SPITFIRE - * - * Interrupt Globals (PSTATE_IG, setup by init_irqwork_curcpu()): - * - * %g6 --> __irq_work[smp_processor_id()] - */ - - rdpr %pstate, %o1 - mov %g6, %o2 - wrpr %o1, PSTATE_AG, %pstate - mov %o2, %g6 - -#define KERN_HIGHBITS ((_PAGE_VALID|_PAGE_SZ4MB)^0xfffff80000000000) -#define KERN_LOWBITS (_PAGE_CP | _PAGE_CV | _PAGE_P | _PAGE_W) - wrpr %o1, PSTATE_MG, %pstate - mov TSB_REG, %g1 - stxa %g0, [%g1] ASI_DMMU - membar #Sync - stxa %g0, [%g1] ASI_IMMU - membar #Sync - mov TLB_SFSR, %g1 - sethi %uhi(KERN_HIGHBITS), %g2 - or %g2, %ulo(KERN_HIGHBITS), %g2 - sllx %g2, 32, %g2 - or %g2, KERN_LOWBITS, %g2 - - BRANCH_IF_ANY_CHEETAH(g3,g7,8f) - ba,pt %xcc, 9f - nop - -8: - sethi %uhi(VPTE_BASE_CHEETAH), %g3 - or %g3, %ulo(VPTE_BASE_CHEETAH), %g3 - ba,pt %xcc, 2f - sllx %g3, 32, %g3 - -9: - sethi %uhi(VPTE_BASE_SPITFIRE), %g3 - or %g3, %ulo(VPTE_BASE_SPITFIRE), %g3 - sllx %g3, 32, %g3 - -2: - clr %g7 -#undef KERN_HIGHBITS -#undef KERN_LOWBITS - - /* Kill PROM timer */ - sethi %hi(0x80000000), %o2 - sllx %o2, 32, %o2 - wr %o2, 0, %tick_cmpr - - BRANCH_IF_ANY_CHEETAH(o2,o3,1f) - - ba,pt %xcc, 2f - nop - - /* Disable STICK_INT interrupts. */ -1: - sethi %hi(0x80000000), %o2 - sllx %o2, 32, %o2 - wr %o2, %asr25 - -2: - wrpr %g0, %g0, %wstate - wrpr %o1, 0x0, %pstate - - call init_irqwork_curcpu - nop - - /* Now we can turn interrupts back on. */ - rdpr %pstate, %o1 - or %o1, PSTATE_IE, %o1 - wrpr %o1, 0, %pstate - wrpr %g0, 0x0, %pil - - ret - restore - - .globl setup_tba -setup_tba: /* i0 = is_starfire */ - save %sp, -192, %sp - - /* The boot processor is the only cpu which invokes this - * routine, the other cpus set things up via trampoline.S. - * So save the OBP trap table address here. - */ - rdpr %tba, %g7 - sethi %hi(prom_tba), %o1 - or %o1, %lo(prom_tba), %o1 - stx %g7, [%o1] - - call setup_trap_table - nop - - ret - restore -sparc64_boot_end: - -#include "systbls.S" -#include "ktlb.S" -#include "etrap.S" -#include "rtrap.S" -#include "winfixup.S" -#include "entry.S" - -/* - * The following skip makes sure the trap table in ttable.S is aligned - * on a 32K boundary as required by the v9 specs for TBA register. - */ -1: - .skip 0x4000 + _start - 1b - -#ifdef CONFIG_SBUS -/* This is just a hack to fool make depend config.h discovering - strategy: As the .S files below need config.h, but - make depend does not find it for them, we include config.h - in head.S */ -#endif - -! 0x0000000000408000 - -#include "ttable.S" - - .data - .align 8 - .globl prom_tba, tlb_type -prom_tba: .xword 0 -tlb_type: .word 0 /* Must NOT end up in BSS */ - .section ".fixup",#alloc,#execinstr - - .globl __ret_efault, __retl_efault -__ret_efault: - ret - restore %g0, -EFAULT, %o0 -__retl_efault: - retl - mov -EFAULT, %o0 |