diff options
Diffstat (limited to 'arch/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/asm-offsets.c | 16 | ||||
| -rw-r--r-- | arch/ia64/kernel/efi.c | 156 | ||||
| -rw-r--r-- | arch/ia64/kernel/efi_stub.S | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/entry.h | 1 | ||||
| -rw-r--r-- | arch/ia64/kernel/mca_asm.S | 28 | ||||
| -rw-r--r-- | arch/ia64/kernel/sal.c | 6 | ||||
| -rw-r--r-- | arch/ia64/kernel/setup.c | 1 |
7 files changed, 135 insertions, 75 deletions
diff --git a/arch/ia64/kernel/asm-offsets.c b/arch/ia64/kernel/asm-offsets.c index 77225659e96..16e7b6600ae 100644 --- a/arch/ia64/kernel/asm-offsets.c +++ b/arch/ia64/kernel/asm-offsets.c @@ -217,16 +217,24 @@ void foo(void) DEFINE(IA64_MCA_CPU_INIT_STACK_OFFSET, offsetof (struct ia64_mca_cpu, init_stack)); BLANK(); - DEFINE(IA64_SAL_OS_STATE_COMMON_OFFSET, - offsetof (struct ia64_sal_os_state, sal_ra)); DEFINE(IA64_SAL_OS_STATE_OS_GP_OFFSET, offsetof (struct ia64_sal_os_state, os_gp)); - DEFINE(IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET, - offsetof (struct ia64_sal_os_state, pal_min_state)); DEFINE(IA64_SAL_OS_STATE_PROC_STATE_PARAM_OFFSET, offsetof (struct ia64_sal_os_state, proc_state_param)); + DEFINE(IA64_SAL_OS_STATE_SAL_RA_OFFSET, + offsetof (struct ia64_sal_os_state, sal_ra)); + DEFINE(IA64_SAL_OS_STATE_SAL_GP_OFFSET, + offsetof (struct ia64_sal_os_state, sal_gp)); + DEFINE(IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET, + offsetof (struct ia64_sal_os_state, pal_min_state)); + DEFINE(IA64_SAL_OS_STATE_OS_STATUS_OFFSET, + offsetof (struct ia64_sal_os_state, os_status)); + DEFINE(IA64_SAL_OS_STATE_CONTEXT_OFFSET, + offsetof (struct ia64_sal_os_state, context)); DEFINE(IA64_SAL_OS_STATE_SIZE, sizeof (struct ia64_sal_os_state)); + BLANK(); + DEFINE(IA64_PMSA_GR_OFFSET, offsetof (struct pal_min_state_area_s, pmsa_gr)); DEFINE(IA64_PMSA_BANK1_GR_OFFSET, diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c index 12cfedce73b..c33d0ba7e30 100644 --- a/arch/ia64/kernel/efi.c +++ b/arch/ia64/kernel/efi.c @@ -8,6 +8,8 @@ * Copyright (C) 1999-2003 Hewlett-Packard Co. * David Mosberger-Tang <davidm@hpl.hp.com> * Stephane Eranian <eranian@hpl.hp.com> + * (c) Copyright 2006 Hewlett-Packard Development Company, L.P. + * Bjorn Helgaas <bjorn.helgaas@hp.com> * * All EFI Runtime Services are not implemented yet as EFI only * supports physical mode addressing on SoftSDV. This is to be fixed @@ -622,28 +624,20 @@ efi_get_iobase (void) return 0; } -static efi_memory_desc_t * -efi_memory_descriptor (unsigned long phys_addr) +static struct kern_memdesc * +kern_memory_descriptor (unsigned long phys_addr) { - void *efi_map_start, *efi_map_end, *p; - efi_memory_desc_t *md; - u64 efi_desc_size; - - efi_map_start = __va(ia64_boot_param->efi_memmap); - efi_map_end = efi_map_start + ia64_boot_param->efi_memmap_size; - efi_desc_size = ia64_boot_param->efi_memdesc_size; + struct kern_memdesc *md; - for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { - md = p; - - if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) + for (md = kern_memmap; md->start != ~0UL; md++) { + if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT)) return md; } return 0; } -static int -efi_memmap_has_mmio (void) +static efi_memory_desc_t * +efi_memory_descriptor (unsigned long phys_addr) { void *efi_map_start, *efi_map_end, *p; efi_memory_desc_t *md; @@ -656,8 +650,8 @@ efi_memmap_has_mmio (void) for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) { md = p; - if (md->type == EFI_MEMORY_MAPPED_IO) - return 1; + if (phys_addr - md->phys_addr < (md->num_pages << EFI_PAGE_SHIFT)) + return md; } return 0; } @@ -683,71 +677,125 @@ efi_mem_attributes (unsigned long phys_addr) } EXPORT_SYMBOL(efi_mem_attributes); -/* - * Determines whether the memory at phys_addr supports the desired - * attribute (WB, UC, etc). If this returns 1, the caller can safely - * access size bytes at phys_addr with the specified attribute. - */ -int -efi_mem_attribute_range (unsigned long phys_addr, unsigned long size, u64 attr) +u64 +efi_mem_attribute (unsigned long phys_addr, unsigned long size) { unsigned long end = phys_addr + size; efi_memory_desc_t *md = efi_memory_descriptor(phys_addr); + u64 attr; + + if (!md) + return 0; + + /* + * EFI_MEMORY_RUNTIME is not a memory attribute; it just tells + * the kernel that firmware needs this region mapped. + */ + attr = md->attribute & ~EFI_MEMORY_RUNTIME; + do { + unsigned long md_end = efi_md_end(md); + + if (end <= md_end) + return attr; + + md = efi_memory_descriptor(md_end); + if (!md || (md->attribute & ~EFI_MEMORY_RUNTIME) != attr) + return 0; + } while (md); + return 0; +} + +u64 +kern_mem_attribute (unsigned long phys_addr, unsigned long size) +{ + unsigned long end = phys_addr + size; + struct kern_memdesc *md; + u64 attr; /* - * Some firmware doesn't report MMIO regions in the EFI memory - * map. The Intel BigSur (a.k.a. HP i2000) has this problem. - * On those platforms, we have to assume UC is valid everywhere. + * This is a hack for ioremap calls before we set up kern_memmap. + * Maybe we should do efi_memmap_init() earlier instead. */ - if (!md || (md->attribute & attr) != attr) { - if (attr == EFI_MEMORY_UC && !efi_memmap_has_mmio()) - return 1; + if (!kern_memmap) { + attr = efi_mem_attribute(phys_addr, size); + if (attr & EFI_MEMORY_WB) + return EFI_MEMORY_WB; return 0; } + md = kern_memory_descriptor(phys_addr); + if (!md) + return 0; + + attr = md->attribute; do { - unsigned long md_end = efi_md_end(md); + unsigned long md_end = kmd_end(md); if (end <= md_end) - return 1; + return attr; - md = efi_memory_descriptor(md_end); - if (!md || (md->attribute & attr) != attr) + md = kern_memory_descriptor(md_end); + if (!md || md->attribute != attr) return 0; } while (md); return 0; } +EXPORT_SYMBOL(kern_mem_attribute); -/* - * For /dev/mem, we only allow read & write system calls to access - * write-back memory, because read & write don't allow the user to - * control access size. - */ int valid_phys_addr_range (unsigned long phys_addr, unsigned long size) { - return efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB); + u64 attr; + + /* + * /dev/mem reads and writes use copy_to_user(), which implicitly + * uses a granule-sized kernel identity mapping. It's really + * only safe to do this for regions in kern_memmap. For more + * details, see Documentation/ia64/aliasing.txt. + */ + attr = kern_mem_attribute(phys_addr, size); + if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC) + return 1; + return 0; } -/* - * We allow mmap of anything in the EFI memory map that supports - * either write-back or uncacheable access. For uncacheable regions, - * the supported access sizes are system-dependent, and the user is - * responsible for using the correct size. - * - * Note that this doesn't currently allow access to hot-added memory, - * because that doesn't appear in the boot-time EFI memory map. - */ int valid_mmap_phys_addr_range (unsigned long phys_addr, unsigned long size) { - if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_WB)) - return 1; + /* + * MMIO regions are often missing from the EFI memory map. + * We must allow mmap of them for programs like X, so we + * currently can't do any useful validation. + */ + return 1; +} - if (efi_mem_attribute_range(phys_addr, size, EFI_MEMORY_UC)) - return 1; +pgprot_t +phys_mem_access_prot(struct file *file, unsigned long pfn, unsigned long size, + pgprot_t vma_prot) +{ + unsigned long phys_addr = pfn << PAGE_SHIFT; + u64 attr; - return 0; + /* + * For /dev/mem mmap, we use user mappings, but if the region is + * in kern_memmap (and hence may be covered by a kernel mapping), + * we must use the same attribute as the kernel mapping. + */ + attr = kern_mem_attribute(phys_addr, size); + if (attr & EFI_MEMORY_WB) + return pgprot_cacheable(vma_prot); + else if (attr & EFI_MEMORY_UC) + return pgprot_noncached(vma_prot); + + /* + * Some chipsets don't support UC access to memory. If + * WB is supported, we prefer that. + */ + if (efi_mem_attribute(phys_addr, size) & EFI_MEMORY_WB) + return pgprot_cacheable(vma_prot); + + return pgprot_noncached(vma_prot); } int __init diff --git a/arch/ia64/kernel/efi_stub.S b/arch/ia64/kernel/efi_stub.S index 5a7fe70212a..a56e161d751 100644 --- a/arch/ia64/kernel/efi_stub.S +++ b/arch/ia64/kernel/efi_stub.S @@ -61,7 +61,7 @@ GLOBAL_ENTRY(efi_call_phys) or loc3=loc3,r17 mov b6=r2 ;; - andcm r16=loc3,r16 // get psr with IT, DT, and RT bits cleared + andcm r16=loc3,r16 // get psr with IT, DT, and RT bits cleared br.call.sptk.many rp=ia64_switch_mode_phys .ret0: mov out4=in5 mov out0=in1 diff --git a/arch/ia64/kernel/entry.h b/arch/ia64/kernel/entry.h index 78eeb079341..ebc3dfb8882 100644 --- a/arch/ia64/kernel/entry.h +++ b/arch/ia64/kernel/entry.h @@ -23,6 +23,7 @@ #define PT(f) (IA64_PT_REGS_##f##_OFFSET) #define SW(f) (IA64_SWITCH_STACK_##f##_OFFSET) +#define SOS(f) (IA64_SAL_OS_STATE_##f##_OFFSET) #define PT_REGS_SAVES(off) \ .unwabi 3, 'i'; \ diff --git a/arch/ia64/kernel/mca_asm.S b/arch/ia64/kernel/mca_asm.S index 6dff024cd62..c1bd1feffab 100644 --- a/arch/ia64/kernel/mca_asm.S +++ b/arch/ia64/kernel/mca_asm.S @@ -159,7 +159,7 @@ ia64_os_mca_spin: GET_IA64_MCA_DATA(r2) // Using MCA stack, struct ia64_sal_os_state, variable proc_state_param ;; - add r3=IA64_MCA_CPU_MCA_STACK_OFFSET+MCA_SOS_OFFSET+IA64_SAL_OS_STATE_PROC_STATE_PARAM_OFFSET, r2 + add r3=IA64_MCA_CPU_MCA_STACK_OFFSET+MCA_SOS_OFFSET+SOS(PROC_STATE_PARAM), r2 ;; ld8 r18=[r3] // Get processor state parameter on existing PALE_CHECK. ;; @@ -479,9 +479,11 @@ ia64_state_save: st8 [temp2]=r11,16 // rv_rc mov r11=cr.iipa ;; - st8 [temp1]=r18,16 // proc_state_param - st8 [temp2]=r19,16 // monarch + st8 [temp1]=r18 // proc_state_param + st8 [temp2]=r19 // monarch mov r6=IA64_KR(CURRENT) + add temp1=SOS(SAL_RA), regs + add temp2=SOS(SAL_GP), regs ;; st8 [temp1]=r12,16 // sal_ra st8 [temp2]=r10,16 // sal_gp @@ -503,12 +505,14 @@ ia64_state_save: st8 [temp2]=r11,16 // cr.iipa mov r12=cr.iim ;; - st8 [temp1]=r12,16 // cr.iim + st8 [temp1]=r12 // cr.iim (p1) mov r12=IA64_MCA_COLD_BOOT (p2) mov r12=IA64_INIT_WARM_BOOT mov r6=cr.iha + add temp1=SOS(OS_STATUS), regs ;; - st8 [temp2]=r6,16 // cr.iha + st8 [temp2]=r6 // cr.iha + add temp2=SOS(CONTEXT), regs st8 [temp1]=r12 // os_status, default is cold boot mov r6=IA64_MCA_SAME_CONTEXT ;; @@ -820,8 +824,8 @@ ia64_state_restore: // Restore the SAL to OS state. The previous code left regs at pt_regs. add regs=MCA_SOS_OFFSET-MCA_PT_REGS_OFFSET, regs ;; - add temp1=IA64_SAL_OS_STATE_COMMON_OFFSET, regs - add temp2=IA64_SAL_OS_STATE_COMMON_OFFSET+8, regs + add temp1=SOS(SAL_RA), regs + add temp2=SOS(SAL_GP), regs ;; ld8 r12=[temp1],16 // sal_ra ld8 r9=[temp2],16 // sal_gp @@ -842,8 +846,10 @@ ia64_state_restore: ;; mov cr.itir=temp3 mov cr.iipa=temp4 - ld8 temp3=[temp1],16 // cr.iim - ld8 temp4=[temp2],16 // cr.iha + ld8 temp3=[temp1] // cr.iim + ld8 temp4=[temp2] // cr.iha + add temp1=SOS(OS_STATUS), regs + add temp2=SOS(CONTEXT), regs ;; mov cr.iim=temp3 mov cr.iha=temp4 @@ -916,7 +922,7 @@ ia64_state_restore: ia64_new_stack: add regs=MCA_PT_REGS_OFFSET, r3 - add temp2=MCA_SOS_OFFSET+IA64_SAL_OS_STATE_PAL_MIN_STATE_OFFSET, r3 + add temp2=MCA_SOS_OFFSET+SOS(PAL_MIN_STATE), r3 mov b0=r2 // save return address GET_IA64_MCA_DATA(temp1) invala @@ -1020,7 +1026,7 @@ ia64_old_stack: ia64_set_kernel_registers: add temp3=MCA_SP_OFFSET, r3 - add temp4=MCA_SOS_OFFSET+IA64_SAL_OS_STATE_OS_GP_OFFSET, r3 + add temp4=MCA_SOS_OFFSET+SOS(OS_GP), r3 mov b0=r2 // save return address GET_IA64_MCA_DATA(temp1) ;; diff --git a/arch/ia64/kernel/sal.c b/arch/ia64/kernel/sal.c index 056f7a6eedc..77fa65903d9 100644 --- a/arch/ia64/kernel/sal.c +++ b/arch/ia64/kernel/sal.c @@ -227,7 +227,7 @@ static int sal_cache_flush_drops_interrupts; static void __init check_sal_cache_flush (void) { - unsigned long flags, itv; + unsigned long flags; int cpu; u64 vector; @@ -238,9 +238,6 @@ check_sal_cache_flush (void) * Schedule a timer interrupt, wait until it's reported, and see if * SAL_CACHE_FLUSH drops it. */ - itv = ia64_get_itv(); - BUG_ON((itv & (1 << 16)) == 0); - ia64_set_itv(IA64_TIMER_VECTOR); ia64_set_itm(ia64_get_itc() + 1000); @@ -260,7 +257,6 @@ check_sal_cache_flush (void) ia64_eoi(); } - ia64_set_itv(itv); local_irq_restore(flags); put_cpu(); } diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index e4dfda1eb7d..6dba2d63f24 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -260,6 +260,7 @@ reserve_memory (void) n++; num_rsvd_regions = n; + BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n); sort_regions(rsvd_region, num_rsvd_regions); } |