diff options
Diffstat (limited to 'arch/parisc/kernel/head.S')
| -rw-r--r-- | arch/parisc/kernel/head.S | 59 |
1 files changed, 31 insertions, 28 deletions
diff --git a/arch/parisc/kernel/head.S b/arch/parisc/kernel/head.S index 0b47afc2069..d4dc588c0dc 100644 --- a/arch/parisc/kernel/head.S +++ b/arch/parisc/kernel/head.S @@ -2,7 +2,7 @@ * License. See the file "COPYING" in the main directory of this archive * for more details. * - * Copyright (C) 1999 by Helge Deller + * Copyright (C) 1999-2007 by Helge Deller <deller@gmx.de> * Copyright 1999 SuSE GmbH (Philipp Rumpf) * Copyright 1999 Philipp Rumpf (prumpf@tux.org) * Copyright 2000 Hewlett Packard (Paul Bame, bame@puffin.external.hp.com) @@ -12,8 +12,6 @@ * Initial Version 04-23-1999 by Helge Deller <deller@gmx.de> */ -#include <linux/config.h> /* for CONFIG_SMP */ - #include <asm/asm-offsets.h> #include <asm/psw.h> #include <asm/pdc.h> @@ -21,18 +19,21 @@ #include <asm/assembly.h> #include <asm/pgtable.h> - .level LEVEL +#include <linux/linkage.h> +#include <linux/init.h> - .data + .level LEVEL - .export boot_args -boot_args: + __INITDATA +ENTRY(boot_args) .word 0 /* arg0 */ .word 0 /* arg1 */ .word 0 /* arg2 */ .word 0 /* arg3 */ +END(boot_args) + + __HEAD - .text .align 4 .import init_thread_union,data .import fault_vector_20,code /* IVA parisc 2.0 32 bit */ @@ -40,10 +41,7 @@ boot_args: .import fault_vector_11,code /* IVA parisc 1.1 32 bit */ .import $global$ /* forward declaration */ #endif /*!CONFIG_64BIT*/ - .export stext - .export _stext,data /* Kernel want it this way! */ -_stext: -stext: +ENTRY(parisc_kernel_start) .proc .callinfo @@ -76,16 +74,16 @@ $bss_loop: mtctl %r4,%cr24 /* Initialize kernel root pointer */ mtctl %r4,%cr25 /* Initialize user root pointer */ -#ifdef CONFIG_64BIT +#if PT_NLEVELS == 3 /* Set pmd in pgd */ load32 PA(pmd0),%r5 shrd %r5,PxD_VALUE_SHIFT,%r3 - ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3 + ldo (PxD_FLAG_PRESENT+PxD_FLAG_VALID)(%r3),%r3 stw %r3,ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4) ldo ASM_PMD_ENTRY*ASM_PMD_ENTRY_SIZE(%r5),%r4 #else /* 2-level page table, so pmd == pgd */ - ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4 + ldo ASM_PGD_ENTRY*ASM_PGD_ENTRY_SIZE(%r4),%r4 #endif /* Fill in pmd with enough pte directories */ @@ -97,30 +95,32 @@ $bss_loop: 1: stw %r3,0(%r4) - ldo (ASM_PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3 + ldo (PAGE_SIZE >> PxD_VALUE_SHIFT)(%r3),%r3 addib,> -1,%r1,1b -#ifdef CONFIG_64BIT +#if PT_NLEVELS == 3 ldo ASM_PMD_ENTRY_SIZE(%r4),%r4 #else ldo ASM_PGD_ENTRY_SIZE(%r4),%r4 #endif - /* Now initialize the PTEs themselves */ - ldo _PAGE_KERNEL(%r0),%r3 /* Hardwired 0 phys addr start */ + /* Now initialize the PTEs themselves. We use RWX for + * everything ... it will get remapped correctly later */ + ldo 0+_PAGE_KERNEL_RWX(%r0),%r3 /* Hardwired 0 phys addr start */ + ldi (1<<(KERNEL_INITIAL_ORDER-PAGE_SHIFT)),%r11 /* PFN count */ load32 PA(pg0),%r1 $pgt_fill_loop: STREGM %r3,ASM_PTE_ENTRY_SIZE(%r1) - ldo ASM_PAGE_SIZE(%r3),%r3 - bb,>= %r3,31-KERNEL_INITIAL_ORDER,$pgt_fill_loop + ldo (1<<PFN_PTE_SHIFT)(%r3),%r3 /* add one PFN */ + addib,> -1,%r11,$pgt_fill_loop nop /* Load the return address...er...crash 'n burn */ copy %r0,%r2 /* And the RFI Target address too */ - load32 start_kernel,%r11 + load32 start_parisc,%r11 /* And the initial task pointer */ load32 init_thread_union,%r6 @@ -129,12 +129,8 @@ $pgt_fill_loop: /* And the stack pointer too */ ldo THREAD_SZ_ALGN(%r6),%sp - /* And the interrupt stack */ - load32 interrupt_stack,%r6 - mtctl %r6,%cr31 - #ifdef CONFIG_SMP - /* Set the smp rendevous address into page zero. + /* Set the smp rendezvous address into page zero. ** It would be safer to do this in init_smp_config() but ** it's just way easier to deal with here because ** of 64-bit function ptrs and the address is local to this file. @@ -197,6 +193,8 @@ common_stext: ldw MEM_PDC_HI(%r0),%r6 depd %r6, 31, 32, %r3 /* move to upper word */ + mfctl %cr30,%r6 /* PCX-W2 firmware bug */ + ldo PDC_PSW(%r0),%arg0 /* 21 */ ldo PDC_PSW_SET_DEFAULTS(%r0),%arg1 /* 2 */ ldo PDC_PSW_WIDE_BIT(%r0),%arg2 /* 2 */ @@ -205,6 +203,8 @@ common_stext: copy %r0,%arg3 stext_pdc_ret: + mtctl %r6,%cr30 /* restore task thread info */ + /* restore rfi target address*/ ldd TI_TASK-THREAD_SZ_ALGN(%sp), %r10 tophys_r1 %r10 @@ -344,8 +344,11 @@ smp_slave_stext: .procend #endif /* CONFIG_SMP */ + +ENDPROC(parisc_kernel_start) + #ifndef CONFIG_64BIT - .data + .section .data..read_mostly .align 4 .export $global$,data |