| /* head.S: Initial boot code for the Sparc64 port of Linux. |
| * |
| * Copyright (C) 1996, 1997, 2007 David S. Miller (davem@davemloft.net) |
| * 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/version.h> |
| #include <linux/errno.h> |
| #include <linux/threads.h> |
| #include <linux/init.h> |
| #include <linux/linkage.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> |
| #include <asm/cpudata.h> |
| #include <asm/pil.h> |
| #include <asm/estate.h> |
| #include <asm/sfafsr.h> |
| #include <asm/unistd.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: |
| 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, prom_root_node |
| .globl prom_getprop_name, prom_mmu_name, prom_peer_name |
| .globl prom_callmethod_name, prom_translate_name, prom_root_compatible |
| .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 |
| .globl prom_compatible_name, prom_cpu_path, prom_cpu_compatible |
| .globl is_sun4v, sun4v_chip_type, prom_set_trap_table_name |
| prom_peer_name: |
| .asciz "peer" |
| prom_compatible_name: |
| .asciz "compatible" |
| prom_finddev_name: |
| .asciz "finddevice" |
| prom_chosen_path: |
| .asciz "/chosen" |
| prom_cpu_path: |
| .asciz "/cpu" |
| 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" |
| prom_set_trap_table_name: |
| .asciz "SUNW,set-trap-table" |
| prom_sun4v_name: |
| .asciz "sun4v" |
| prom_niagara_prefix: |
| .asciz "SUNW,UltraSPARC-T" |
| .align 4 |
| prom_root_compatible: |
| .skip 64 |
| prom_cpu_compatible: |
| .skip 64 |
| prom_root_node: |
| .word 0 |
| 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 |
| is_sun4v: |
| .word 0 |
| sun4v_chip_type: |
| .word SUN4V_CHIP_INVALID |
| 1: |
| rd %pc, %l0 |
| |
| mov (1b - prom_peer_name), %l1 |
| sub %l0, %l1, %l1 |
| mov 0, %l2 |
| |
| /* prom_root_node = prom_peer(0) */ |
| stx %l1, [%sp + 2047 + 128 + 0x00] ! service, "peer" |
| 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, 0 |
| stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 |
| call %l7 |
| add %sp, (2047 + 128), %o0 ! argument array |
| |
| ldx [%sp + 2047 + 128 + 0x20], %l4 ! prom root node |
| mov (1b - prom_root_node), %l1 |
| sub %l0, %l1, %l1 |
| stw %l4, [%l1] |
| |
| mov (1b - prom_getprop_name), %l1 |
| mov (1b - prom_compatible_name), %l2 |
| mov (1b - prom_root_compatible), %l5 |
| sub %l0, %l1, %l1 |
| sub %l0, %l2, %l2 |
| sub %l0, %l5, %l5 |
| |
| /* prom_getproperty(prom_root_node, "compatible", |
| * &prom_root_compatible, 64) |
| */ |
| 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, prom_root_node |
| stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible" |
| stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_root_compatible |
| mov 64, %l3 |
| stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size |
| stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 |
| call %l7 |
| add %sp, (2047 + 128), %o0 ! argument array |
| |
| 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) |
| /* 4MB align the kernel image size. */ |
| set (_end - KERNBASE), %l3 |
| set ((4 * 1024 * 1024) - 1), %l4 |
| add %l3, %l4, %l3 |
| andn %l3, %l4, %l3 |
| stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4: roundup(ksize, 4MB) |
| 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 |
| |
| sethi %hi(prom_root_compatible), %g1 |
| or %g1, %lo(prom_root_compatible), %g1 |
| sethi %hi(prom_sun4v_name), %g7 |
| or %g7, %lo(prom_sun4v_name), %g7 |
| mov 5, %g3 |
| 90: ldub [%g7], %g2 |
| ldub [%g1], %g4 |
| cmp %g2, %g4 |
| bne,pn %icc, 80f |
| add %g7, 1, %g7 |
| subcc %g3, 1, %g3 |
| bne,pt %xcc, 90b |
| add %g1, 1, %g1 |
| |
| sethi %hi(is_sun4v), %g1 |
| or %g1, %lo(is_sun4v), %g1 |
| mov 1, %g7 |
| stw %g7, [%g1] |
| |
| /* cpu_node = prom_finddevice("/cpu") */ |
| mov (1b - prom_finddev_name), %l1 |
| mov (1b - prom_cpu_path), %l2 |
| sub %l0, %l1, %l1 |
| sub %l0, %l2, %l2 |
| sub %sp, (192 + 128), %sp |
| |
| 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, "/cpu" |
| stx %g0, [%sp + 2047 + 128 + 0x20] ! ret1 |
| call %l7 |
| add %sp, (2047 + 128), %o0 ! argument array |
| |
| ldx [%sp + 2047 + 128 + 0x20], %l4 ! cpu device node |
| |
| mov (1b - prom_getprop_name), %l1 |
| mov (1b - prom_compatible_name), %l2 |
| mov (1b - prom_cpu_compatible), %l5 |
| sub %l0, %l1, %l1 |
| sub %l0, %l2, %l2 |
| sub %l0, %l5, %l5 |
| |
| /* prom_getproperty(cpu_node, "compatible", |
| * &prom_cpu_compatible, 64) |
| */ |
| 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, cpu_node |
| stx %l2, [%sp + 2047 + 128 + 0x20] ! arg2, "compatible" |
| stx %l5, [%sp + 2047 + 128 + 0x28] ! arg3, &prom_cpu_compatible |
| mov 64, %l3 |
| stx %l3, [%sp + 2047 + 128 + 0x30] ! arg4, size |
| stx %g0, [%sp + 2047 + 128 + 0x38] ! ret1 |
| call %l7 |
| add %sp, (2047 + 128), %o0 ! argument array |
| |
| add %sp, (192 + 128), %sp |
| |
| sethi %hi(prom_cpu_compatible), %g1 |
| or %g1, %lo(prom_cpu_compatible), %g1 |
| sethi %hi(prom_niagara_prefix), %g7 |
| or %g7, %lo(prom_niagara_prefix), %g7 |
| mov 17, %g3 |
| 90: ldub [%g7], %g2 |
| ldub [%g1], %g4 |
| cmp %g2, %g4 |
| bne,pn %icc, 4f |
| add %g7, 1, %g7 |
| subcc %g3, 1, %g3 |
| bne,pt %xcc, 90b |
| add %g1, 1, %g1 |
| |
| sethi %hi(prom_cpu_compatible), %g1 |
| or %g1, %lo(prom_cpu_compatible), %g1 |
| ldub [%g1 + 17], %g2 |
| cmp %g2, '1' |
| be,pt %xcc, 5f |
| mov SUN4V_CHIP_NIAGARA1, %g4 |
| cmp %g2, '2' |
| be,pt %xcc, 5f |
| mov SUN4V_CHIP_NIAGARA2, %g4 |
| 4: |
| mov SUN4V_CHIP_UNKNOWN, %g4 |
| 5: sethi %hi(sun4v_chip_type), %g2 |
| or %g2, %lo(sun4v_chip_type), %g2 |
| stw %g4, [%g2] |
| |
| 80: |
| BRANCH_IF_SUN4V(g1, jump_to_sun4u_init) |
| 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 |
| |
| .section .text.init.refok |
| sun4u_init: |
| BRANCH_IF_SUN4V(g1, sun4v_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 |
| |
| ba,pt %xcc, sun4u_continue |
| nop |
| |
| sun4v_init: |
| /* Set ctx 0 */ |
| mov PRIMARY_CONTEXT, %g7 |
| stxa %g0, [%g7] ASI_MMU |
| membar #Sync |
| |
| mov SECONDARY_CONTEXT, %g7 |
| stxa %g0, [%g7] ASI_MMU |
| membar #Sync |
| ba,pt %xcc, niagara_tlb_fixup |
| nop |
| |
| sun4u_continue: |
| BRANCH_IF_ANY_CHEETAH(g1, g7, cheetah_tlb_fixup) |
| |
| ba,pt %xcc, spitfire_tlb_fixup |
| nop |
| |
| niagara_tlb_fixup: |
| mov 3, %g2 /* Set TLB type to hypervisor. */ |
| sethi %hi(tlb_type), %g1 |
| stw %g2, [%g1 + %lo(tlb_type)] |
| |
| /* Patch copy/clear ops. */ |
| sethi %hi(sun4v_chip_type), %g1 |
| lduw [%g1 + %lo(sun4v_chip_type)], %g1 |
| cmp %g1, SUN4V_CHIP_NIAGARA1 |
| be,pt %xcc, niagara_patch |
| cmp %g1, SUN4V_CHIP_NIAGARA2 |
| be,pt %xcc, niagara2_patch |
| nop |
| |
| call generic_patch_copyops |
| nop |
| call generic_patch_bzero |
| nop |
| call generic_patch_pageops |
| nop |
| |
| ba,a,pt %xcc, 80f |
| niagara2_patch: |
| call niagara2_patch_copyops |
| nop |
| call niagara_patch_bzero |
| nop |
| call niagara2_patch_pageops |
| nop |
| |
| ba,a,pt %xcc, 80f |
| |
| niagara_patch: |
| call niagara_patch_copyops |
| nop |
| call niagara_patch_bzero |
| nop |
| call niagara_patch_pageops |
| nop |
| |
| 80: |
| /* Patch TLB/cache ops. */ |
| call hypervisor_patch_cachetlbops |
| nop |
| |
| ba,pt %xcc, tlb_fixup_done |
| 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 |
| |
| 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 |
| |
| #ifdef CONFIG_LOCKDEP |
| /* We have this call this super early, as even prom_init can grab |
| * spinlocks and thus call into the lockdep code. |
| */ |
| call lockdep_init |
| nop |
| #endif |
| |
| mov %l6, %o1 ! OpenPROM stack |
| call prom_init |
| mov %l7, %o0 ! OpenPROM cif handler |
| |
| /* Initialize current_thread_info()->cpu as early as possible. |
| * In order to do that accurately we have to patch up the get_cpuid() |
| * assembler sequences. And that, in turn, requires that we know |
| * if we are on a Starfire box or not. While we're here, patch up |
| * the sun4v sequences as well. |
| */ |
| call check_if_starfire |
| nop |
| call per_cpu_patch |
| nop |
| call sun4v_patch |
| nop |
| |
| #ifdef CONFIG_SMP |
| call hard_smp_processor_id |
| nop |
| cmp %o0, NR_CPUS |
| blu,pt %xcc, 1f |
| nop |
| call boot_cpu_id_too_large |
| nop |
| /* Not reached... */ |
| |
| 1: |
| /* If we boot on a non-zero cpu, all of the per-cpu |
| * variable references we make before setting up the |
| * per-cpu areas will use a bogus offset. Put a |
| * compensating factor into __per_cpu_base to handle |
| * this cleanly. |
| * |
| * What the per-cpu code calculates is: |
| * |
| * __per_cpu_base + (cpu << __per_cpu_shift) |
| * |
| * These two variables are zero initially, so to |
| * make it all cancel out to zero we need to put |
| * "0 - (cpu << 0)" into __per_cpu_base so that the |
| * above formula evaluates to zero. |
| * |
| * We cannot even perform a printk() until this stuff |
| * is setup as that calls cpu_clock() which uses |
| * per-cpu variables. |
| */ |
| sub %g0, %o0, %o1 |
| sethi %hi(__per_cpu_base), %o2 |
| stx %o1, [%o2 + %lo(__per_cpu_base)] |
| #else |
| mov 0, %o0 |
| #endif |
| sth %o0, [%g6 + TI_CPU] |
| |
| call prom_init_report |
| nop |
| |
| /* Off we go.... */ |
| call start_kernel |
| nop |
| /* Not reached... */ |
| |
| .previous |
| |
| /* 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, %l0 |
| andn %l0, PSTATE_IE, %o1 |
| wrpr %o1, 0x0, %pstate |
| rdpr %pil, %l1 |
| wrpr %g0, PIL_NORMAL_MAX, %pil |
| |
| /* Make the firmware call to jump over to the Linux trap table. */ |
| sethi %hi(is_sun4v), %o0 |
| lduw [%o0 + %lo(is_sun4v)], %o0 |
| brz,pt %o0, 1f |
| nop |
| |
| TRAP_LOAD_TRAP_BLOCK(%g2, %g3) |
| add %g2, TRAP_PER_CPU_FAULT_INFO, %g2 |
| stxa %g2, [%g0] ASI_SCRATCHPAD |
| |
| /* Compute physical address: |
| * |
| * paddr = kern_base + (mmfsa_vaddr - KERNBASE) |
| */ |
| sethi %hi(KERNBASE), %g3 |
| sub %g2, %g3, %g2 |
| sethi %hi(kern_base), %g3 |
| ldx [%g3 + %lo(kern_base)], %g3 |
| add %g2, %g3, %o1 |
| sethi %hi(sparc64_ttable_tl0), %o0 |
| |
| set prom_set_trap_table_name, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x00] |
| mov 2, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x08] |
| mov 0, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x10] |
| stx %o0, [%sp + 2047 + 128 + 0x18] |
| stx %o1, [%sp + 2047 + 128 + 0x20] |
| sethi %hi(p1275buf), %g2 |
| or %g2, %lo(p1275buf), %g2 |
| ldx [%g2 + 0x08], %o1 |
| call %o1 |
| add %sp, (2047 + 128), %o0 |
| |
| ba,pt %xcc, 2f |
| nop |
| |
| 1: sethi %hi(sparc64_ttable_tl0), %o0 |
| set prom_set_trap_table_name, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x00] |
| mov 1, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x08] |
| mov 0, %g2 |
| stx %g2, [%sp + 2047 + 128 + 0x10] |
| stx %o0, [%sp + 2047 + 128 + 0x18] |
| sethi %hi(p1275buf), %g2 |
| or %g2, %lo(p1275buf), %g2 |
| ldx [%g2 + 0x08], %o1 |
| call %o1 |
| add %sp, (2047 + 128), %o0 |
| |
| /* Start using proper page size encodings in ctx register. */ |
| 2: sethi %hi(sparc64_kern_pri_context), %g3 |
| ldx [%g3 + %lo(sparc64_kern_pri_context)], %g2 |
| |
| mov PRIMARY_CONTEXT, %g1 |
| |
| 661: stxa %g2, [%g1] ASI_DMMU |
| .section .sun4v_1insn_patch, "ax" |
| .word 661b |
| stxa %g2, [%g1] ASI_MMU |
| .previous |
| |
| membar #Sync |
| |
| BRANCH_IF_SUN4V(o2, 1f) |
| |
| /* 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 |
| |
| call init_irqwork_curcpu |
| nop |
| |
| /* Now we can restore interrupt state. */ |
| wrpr %l0, 0, %pstate |
| wrpr %l1, 0x0, %pil |
| |
| ret |
| restore |
| |
| .globl setup_tba |
| setup_tba: |
| 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 "etrap.S" |
| #include "rtrap.S" |
| #include "winfixup.S" |
| #include "fpu_traps.S" |
| #include "ivec.S" |
| #include "getsetcc.S" |
| #include "utrap.S" |
| #include "spiterrs.S" |
| #include "cherrs.S" |
| #include "misctrap.S" |
| #include "syscalls.S" |
| #include "helpers.S" |
| #include "hvcalls.S" |
| #include "sun4v_tlb_miss.S" |
| #include "sun4v_ivec.S" |
| #include "ktlb.S" |
| #include "tsb.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. |
| * |
| * We align to a 32K boundary, then we have the 32K kernel TSB, |
| * the 64K kernel 4MB TSB, and then the 32K aligned trap table. |
| */ |
| 1: |
| .skip 0x4000 + _start - 1b |
| |
| ! 0x0000000000408000 |
| |
| .globl swapper_tsb |
| swapper_tsb: |
| .skip (32 * 1024) |
| |
| .globl swapper_4m_tsb |
| swapper_4m_tsb: |
| .skip (64 * 1024) |
| |
| ! 0x0000000000420000 |
| |
| /* Some care needs to be exercised if you try to move the |
| * location of the trap table relative to other things. For |
| * one thing there are br* instructions in some of the |
| * trap table entires which branch back to code in ktlb.S |
| * Those instructions can only handle a signed 16-bit |
| * displacement. |
| * |
| * There is a binutils bug (bugzilla #4558) which causes |
| * the relocation overflow checks for such instructions to |
| * not be done correctly. So bintuils will not notice the |
| * error and will instead write junk into the relocation and |
| * you'll have an unbootable kernel. |
| */ |
| #include "ttable.S" |
| |
| ! 0x0000000000428000 |
| |
| #include "systbls.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 |
