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-rw-r--r--arch/ia64/kernel/efi.c1360
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diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
deleted file mode 100644
index 033f5aead8..0000000000
--- a/arch/ia64/kernel/efi.c
+++ /dev/null
@@ -1,1360 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Extensible Firmware Interface
- *
- * Based on Extensible Firmware Interface Specification version 0.9
- * April 30, 1999
- *
- * Copyright (C) 1999 VA Linux Systems
- * Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
- * 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
- * in a future version. --drummond 1999-07-20
- *
- * Implemented EFI runtime services and virtual mode calls. --davidm
- *
- * Goutham Rao: <goutham.rao@intel.com>
- * Skip non-WB memory and ignore empty memory ranges.
- */
-#include <linux/module.h>
-#include <linux/memblock.h>
-#include <linux/crash_dump.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/time.h>
-#include <linux/efi.h>
-#include <linux/kexec.h>
-#include <linux/mm.h>
-
-#include <asm/efi.h>
-#include <asm/io.h>
-#include <asm/kregs.h>
-#include <asm/meminit.h>
-#include <asm/processor.h>
-#include <asm/mca.h>
-#include <asm/sal.h>
-#include <asm/setup.h>
-#include <asm/tlbflush.h>
-
-#define EFI_DEBUG 0
-
-#define ESI_TABLE_GUID \
- EFI_GUID(0x43EA58DC, 0xCF28, 0x4b06, 0xB3, \
- 0x91, 0xB7, 0x50, 0x59, 0x34, 0x2B, 0xD4)
-
-static unsigned long mps_phys = EFI_INVALID_TABLE_ADDR;
-static __initdata unsigned long palo_phys;
-
-unsigned long __initdata esi_phys = EFI_INVALID_TABLE_ADDR;
-unsigned long hcdp_phys = EFI_INVALID_TABLE_ADDR;
-unsigned long sal_systab_phys = EFI_INVALID_TABLE_ADDR;
-
-static const efi_config_table_type_t arch_tables[] __initconst = {
- {ESI_TABLE_GUID, &esi_phys, "ESI" },
- {HCDP_TABLE_GUID, &hcdp_phys, "HCDP" },
- {MPS_TABLE_GUID, &mps_phys, "MPS" },
- {PROCESSOR_ABSTRACTION_LAYER_OVERWRITE_GUID, &palo_phys, "PALO" },
- {SAL_SYSTEM_TABLE_GUID, &sal_systab_phys, "SALsystab" },
- {},
-};
-
-extern efi_status_t efi_call_phys (void *, ...);
-
-static efi_runtime_services_t *runtime;
-static u64 mem_limit = ~0UL, max_addr = ~0UL, min_addr = 0UL;
-
-#define efi_call_virt(f, args...) (*(f))(args)
-
-#define STUB_GET_TIME(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_get_time (efi_time_t *tm, efi_time_cap_t *tc) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_time_cap_t *atc = NULL; \
- efi_status_t ret; \
- \
- if (tc) \
- atc = adjust_arg(tc); \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix((efi_get_time_t *) __va(runtime->get_time), \
- adjust_arg(tm), atc); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_SET_TIME(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_set_time (efi_time_t *tm) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_status_t ret; \
- \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix((efi_set_time_t *) __va(runtime->set_time), \
- adjust_arg(tm)); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_GET_WAKEUP_TIME(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_get_wakeup_time (efi_bool_t *enabled, efi_bool_t *pending, \
- efi_time_t *tm) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_status_t ret; \
- \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix( \
- (efi_get_wakeup_time_t *) __va(runtime->get_wakeup_time), \
- adjust_arg(enabled), adjust_arg(pending), adjust_arg(tm)); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_SET_WAKEUP_TIME(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_set_wakeup_time (efi_bool_t enabled, efi_time_t *tm) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_time_t *atm = NULL; \
- efi_status_t ret; \
- \
- if (tm) \
- atm = adjust_arg(tm); \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix( \
- (efi_set_wakeup_time_t *) __va(runtime->set_wakeup_time), \
- enabled, atm); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_GET_VARIABLE(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_get_variable (efi_char16_t *name, efi_guid_t *vendor, u32 *attr, \
- unsigned long *data_size, void *data) \
-{ \
- struct ia64_fpreg fr[6]; \
- u32 *aattr = NULL; \
- efi_status_t ret; \
- \
- if (attr) \
- aattr = adjust_arg(attr); \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix( \
- (efi_get_variable_t *) __va(runtime->get_variable), \
- adjust_arg(name), adjust_arg(vendor), aattr, \
- adjust_arg(data_size), adjust_arg(data)); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_GET_NEXT_VARIABLE(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_get_next_variable (unsigned long *name_size, efi_char16_t *name, \
- efi_guid_t *vendor) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_status_t ret; \
- \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix( \
- (efi_get_next_variable_t *) __va(runtime->get_next_variable), \
- adjust_arg(name_size), adjust_arg(name), adjust_arg(vendor)); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_SET_VARIABLE(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_set_variable (efi_char16_t *name, efi_guid_t *vendor, \
- u32 attr, unsigned long data_size, \
- void *data) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_status_t ret; \
- \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix( \
- (efi_set_variable_t *) __va(runtime->set_variable), \
- adjust_arg(name), adjust_arg(vendor), attr, data_size, \
- adjust_arg(data)); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_GET_NEXT_HIGH_MONO_COUNT(prefix, adjust_arg) \
-static efi_status_t \
-prefix##_get_next_high_mono_count (u32 *count) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_status_t ret; \
- \
- ia64_save_scratch_fpregs(fr); \
- ret = efi_call_##prefix((efi_get_next_high_mono_count_t *) \
- __va(runtime->get_next_high_mono_count), \
- adjust_arg(count)); \
- ia64_load_scratch_fpregs(fr); \
- return ret; \
-}
-
-#define STUB_RESET_SYSTEM(prefix, adjust_arg) \
-static void \
-prefix##_reset_system (int reset_type, efi_status_t status, \
- unsigned long data_size, efi_char16_t *data) \
-{ \
- struct ia64_fpreg fr[6]; \
- efi_char16_t *adata = NULL; \
- \
- if (data) \
- adata = adjust_arg(data); \
- \
- ia64_save_scratch_fpregs(fr); \
- efi_call_##prefix( \
- (efi_reset_system_t *) __va(runtime->reset_system), \
- reset_type, status, data_size, adata); \
- /* should not return, but just in case... */ \
- ia64_load_scratch_fpregs(fr); \
-}
-
-#define phys_ptr(arg) ((__typeof__(arg)) ia64_tpa(arg))
-
-STUB_GET_TIME(phys, phys_ptr)
-STUB_SET_TIME(phys, phys_ptr)
-STUB_GET_WAKEUP_TIME(phys, phys_ptr)
-STUB_SET_WAKEUP_TIME(phys, phys_ptr)
-STUB_GET_VARIABLE(phys, phys_ptr)
-STUB_GET_NEXT_VARIABLE(phys, phys_ptr)
-STUB_SET_VARIABLE(phys, phys_ptr)
-STUB_GET_NEXT_HIGH_MONO_COUNT(phys, phys_ptr)
-STUB_RESET_SYSTEM(phys, phys_ptr)
-
-#define id(arg) arg
-
-STUB_GET_TIME(virt, id)
-STUB_SET_TIME(virt, id)
-STUB_GET_WAKEUP_TIME(virt, id)
-STUB_SET_WAKEUP_TIME(virt, id)
-STUB_GET_VARIABLE(virt, id)
-STUB_GET_NEXT_VARIABLE(virt, id)
-STUB_SET_VARIABLE(virt, id)
-STUB_GET_NEXT_HIGH_MONO_COUNT(virt, id)
-STUB_RESET_SYSTEM(virt, id)
-
-void
-efi_gettimeofday (struct timespec64 *ts)
-{
- efi_time_t tm;
-
- if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS) {
- memset(ts, 0, sizeof(*ts));
- return;
- }
-
- ts->tv_sec = mktime64(tm.year, tm.month, tm.day,
- tm.hour, tm.minute, tm.second);
- ts->tv_nsec = tm.nanosecond;
-}
-
-static int
-is_memory_available (efi_memory_desc_t *md)
-{
- if (!(md->attribute & EFI_MEMORY_WB))
- return 0;
-
- switch (md->type) {
- case EFI_LOADER_CODE:
- case EFI_LOADER_DATA:
- case EFI_BOOT_SERVICES_CODE:
- case EFI_BOOT_SERVICES_DATA:
- case EFI_CONVENTIONAL_MEMORY:
- return 1;
- }
- return 0;
-}
-
-typedef struct kern_memdesc {
- u64 attribute;
- u64 start;
- u64 num_pages;
-} kern_memdesc_t;
-
-static kern_memdesc_t *kern_memmap;
-
-#define efi_md_size(md) (md->num_pages << EFI_PAGE_SHIFT)
-
-static inline u64
-kmd_end(kern_memdesc_t *kmd)
-{
- return (kmd->start + (kmd->num_pages << EFI_PAGE_SHIFT));
-}
-
-static inline u64
-efi_md_end(efi_memory_desc_t *md)
-{
- return (md->phys_addr + efi_md_size(md));
-}
-
-static inline int
-efi_wb(efi_memory_desc_t *md)
-{
- return (md->attribute & EFI_MEMORY_WB);
-}
-
-static inline int
-efi_uc(efi_memory_desc_t *md)
-{
- return (md->attribute & EFI_MEMORY_UC);
-}
-
-static void
-walk (efi_freemem_callback_t callback, void *arg, u64 attr)
-{
- kern_memdesc_t *k;
- u64 start, end, voff;
-
- voff = (attr == EFI_MEMORY_WB) ? PAGE_OFFSET : __IA64_UNCACHED_OFFSET;
- for (k = kern_memmap; k->start != ~0UL; k++) {
- if (k->attribute != attr)
- continue;
- start = PAGE_ALIGN(k->start);
- end = (k->start + (k->num_pages << EFI_PAGE_SHIFT)) & PAGE_MASK;
- if (start < end)
- if ((*callback)(start + voff, end + voff, arg) < 0)
- return;
- }
-}
-
-/*
- * Walk the EFI memory map and call CALLBACK once for each EFI memory
- * descriptor that has memory that is available for OS use.
- */
-void
-efi_memmap_walk (efi_freemem_callback_t callback, void *arg)
-{
- walk(callback, arg, EFI_MEMORY_WB);
-}
-
-/*
- * Walk the EFI memory map and call CALLBACK once for each EFI memory
- * descriptor that has memory that is available for uncached allocator.
- */
-void
-efi_memmap_walk_uc (efi_freemem_callback_t callback, void *arg)
-{
- walk(callback, arg, EFI_MEMORY_UC);
-}
-
-/*
- * Look for the PAL_CODE region reported by EFI and map it using an
- * ITR to enable safe PAL calls in virtual mode. See IA-64 Processor
- * Abstraction Layer chapter 11 in ADAG
- */
-void *
-efi_get_pal_addr (void)
-{
- void *efi_map_start, *efi_map_end, *p;
- efi_memory_desc_t *md;
- u64 efi_desc_size;
- int pal_code_count = 0;
- u64 vaddr, mask;
-
- 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;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
- if (md->type != EFI_PAL_CODE)
- continue;
-
- if (++pal_code_count > 1) {
- printk(KERN_ERR "Too many EFI Pal Code memory ranges, "
- "dropped @ %llx\n", md->phys_addr);
- continue;
- }
- /*
- * The only ITLB entry in region 7 that is used is the one
- * installed by __start(). That entry covers a 64MB range.
- */
- mask = ~((1 << KERNEL_TR_PAGE_SHIFT) - 1);
- vaddr = PAGE_OFFSET + md->phys_addr;
-
- /*
- * We must check that the PAL mapping won't overlap with the
- * kernel mapping.
- *
- * PAL code is guaranteed to be aligned on a power of 2 between
- * 4k and 256KB and that only one ITR is needed to map it. This
- * implies that the PAL code is always aligned on its size,
- * i.e., the closest matching page size supported by the TLB.
- * Therefore PAL code is guaranteed never to cross a 64MB unless
- * it is bigger than 64MB (very unlikely!). So for now the
- * following test is enough to determine whether or not we need
- * a dedicated ITR for the PAL code.
- */
- if ((vaddr & mask) == (KERNEL_START & mask)) {
- printk(KERN_INFO "%s: no need to install ITR for PAL code\n",
- __func__);
- continue;
- }
-
- if (efi_md_size(md) > IA64_GRANULE_SIZE)
- panic("Whoa! PAL code size bigger than a granule!");
-
-#if EFI_DEBUG
- mask = ~((1 << IA64_GRANULE_SHIFT) - 1);
-
- printk(KERN_INFO "CPU %d: mapping PAL code "
- "[0x%llx-0x%llx) into [0x%llx-0x%llx)\n",
- smp_processor_id(), md->phys_addr,
- md->phys_addr + efi_md_size(md),
- vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
-#endif
- return __va(md->phys_addr);
- }
- printk(KERN_WARNING "%s: no PAL-code memory-descriptor found\n",
- __func__);
- return NULL;
-}
-
-
-static u8 __init palo_checksum(u8 *buffer, u32 length)
-{
- u8 sum = 0;
- u8 *end = buffer + length;
-
- while (buffer < end)
- sum = (u8) (sum + *(buffer++));
-
- return sum;
-}
-
-/*
- * Parse and handle PALO table which is published at:
- * http://www.dig64.org/home/DIG64_PALO_R1_0.pdf
- */
-static void __init handle_palo(unsigned long phys_addr)
-{
- struct palo_table *palo = __va(phys_addr);
- u8 checksum;
-
- if (strncmp(palo->signature, PALO_SIG, sizeof(PALO_SIG) - 1)) {
- printk(KERN_INFO "PALO signature incorrect.\n");
- return;
- }
-
- checksum = palo_checksum((u8 *)palo, palo->length);
- if (checksum) {
- printk(KERN_INFO "PALO checksum incorrect.\n");
- return;
- }
-
- setup_ptcg_sem(palo->max_tlb_purges, NPTCG_FROM_PALO);
-}
-
-void
-efi_map_pal_code (void)
-{
- void *pal_vaddr = efi_get_pal_addr ();
- u64 psr;
-
- if (!pal_vaddr)
- return;
-
- /*
- * Cannot write to CRx with PSR.ic=1
- */
- psr = ia64_clear_ic();
- ia64_itr(0x1, IA64_TR_PALCODE,
- GRANULEROUNDDOWN((unsigned long) pal_vaddr),
- pte_val(pfn_pte(__pa(pal_vaddr) >> PAGE_SHIFT, PAGE_KERNEL)),
- IA64_GRANULE_SHIFT);
- ia64_set_psr(psr); /* restore psr */
-}
-
-void __init
-efi_init (void)
-{
- const efi_system_table_t *efi_systab;
- void *efi_map_start, *efi_map_end;
- u64 efi_desc_size;
- char *cp;
-
- set_bit(EFI_BOOT, &efi.flags);
- set_bit(EFI_64BIT, &efi.flags);
-
- /*
- * It's too early to be able to use the standard kernel command line
- * support...
- */
- for (cp = boot_command_line; *cp; ) {
- if (memcmp(cp, "mem=", 4) == 0) {
- mem_limit = memparse(cp + 4, &cp);
- } else if (memcmp(cp, "max_addr=", 9) == 0) {
- max_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
- } else if (memcmp(cp, "min_addr=", 9) == 0) {
- min_addr = GRANULEROUNDDOWN(memparse(cp + 9, &cp));
- } else {
- while (*cp != ' ' && *cp)
- ++cp;
- while (*cp == ' ')
- ++cp;
- }
- }
- if (min_addr != 0UL)
- printk(KERN_INFO "Ignoring memory below %lluMB\n",
- min_addr >> 20);
- if (max_addr != ~0UL)
- printk(KERN_INFO "Ignoring memory above %lluMB\n",
- max_addr >> 20);
-
- efi_systab = __va(ia64_boot_param->efi_systab);
-
- /*
- * Verify the EFI Table
- */
- if (efi_systab == NULL)
- panic("Whoa! Can't find EFI system table.\n");
- if (efi_systab_check_header(&efi_systab->hdr))
- panic("Whoa! EFI system table signature incorrect\n");
-
- efi_systab_report_header(&efi_systab->hdr, efi_systab->fw_vendor);
-
- palo_phys = EFI_INVALID_TABLE_ADDR;
-
- if (efi_config_parse_tables(__va(efi_systab->tables),
- efi_systab->nr_tables,
- arch_tables) != 0)
- return;
-
- if (palo_phys != EFI_INVALID_TABLE_ADDR)
- handle_palo(palo_phys);
-
- runtime = __va(efi_systab->runtime);
- efi.get_time = phys_get_time;
- efi.set_time = phys_set_time;
- efi.get_wakeup_time = phys_get_wakeup_time;
- efi.set_wakeup_time = phys_set_wakeup_time;
- efi.get_variable = phys_get_variable;
- efi.get_next_variable = phys_get_next_variable;
- efi.set_variable = phys_set_variable;
- efi.get_next_high_mono_count = phys_get_next_high_mono_count;
- efi.reset_system = phys_reset_system;
-
- 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;
-
-#if EFI_DEBUG
- /* print EFI memory map: */
- {
- efi_memory_desc_t *md;
- void *p;
- unsigned int i;
-
- for (i = 0, p = efi_map_start; p < efi_map_end;
- ++i, p += efi_desc_size)
- {
- const char *unit;
- unsigned long size;
- char buf[64];
-
- md = p;
- size = md->num_pages << EFI_PAGE_SHIFT;
-
- if ((size >> 40) > 0) {
- size >>= 40;
- unit = "TB";
- } else if ((size >> 30) > 0) {
- size >>= 30;
- unit = "GB";
- } else if ((size >> 20) > 0) {
- size >>= 20;
- unit = "MB";
- } else {
- size >>= 10;
- unit = "KB";
- }
-
- printk("mem%02d: %s "
- "range=[0x%016llx-0x%016llx) (%4lu%s)\n",
- i, efi_md_typeattr_format(buf, sizeof(buf), md),
- md->phys_addr,
- md->phys_addr + efi_md_size(md), size, unit);
- }
- }
-#endif
-
- efi_map_pal_code();
- efi_enter_virtual_mode();
-}
-
-void
-efi_enter_virtual_mode (void)
-{
- void *efi_map_start, *efi_map_end, *p;
- efi_memory_desc_t *md;
- efi_status_t status;
- 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;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
- if (md->attribute & EFI_MEMORY_RUNTIME) {
- /*
- * Some descriptors have multiple bits set, so the
- * order of the tests is relevant.
- */
- if (md->attribute & EFI_MEMORY_WB) {
- md->virt_addr = (u64) __va(md->phys_addr);
- } else if (md->attribute & EFI_MEMORY_UC) {
- md->virt_addr = (u64) ioremap(md->phys_addr, 0);
- } else if (md->attribute & EFI_MEMORY_WC) {
-#if 0
- md->virt_addr = ia64_remap(md->phys_addr,
- (_PAGE_A |
- _PAGE_P |
- _PAGE_D |
- _PAGE_MA_WC |
- _PAGE_PL_0 |
- _PAGE_AR_RW));
-#else
- printk(KERN_INFO "EFI_MEMORY_WC mapping\n");
- md->virt_addr = (u64) ioremap(md->phys_addr, 0);
-#endif
- } else if (md->attribute & EFI_MEMORY_WT) {
-#if 0
- md->virt_addr = ia64_remap(md->phys_addr,
- (_PAGE_A |
- _PAGE_P |
- _PAGE_D |
- _PAGE_MA_WT |
- _PAGE_PL_0 |
- _PAGE_AR_RW));
-#else
- printk(KERN_INFO "EFI_MEMORY_WT mapping\n");
- md->virt_addr = (u64) ioremap(md->phys_addr, 0);
-#endif
- }
- }
- }
-
- status = efi_call_phys(__va(runtime->set_virtual_address_map),
- ia64_boot_param->efi_memmap_size,
- efi_desc_size,
- ia64_boot_param->efi_memdesc_version,
- ia64_boot_param->efi_memmap);
- if (status != EFI_SUCCESS) {
- printk(KERN_WARNING "warning: unable to switch EFI into "
- "virtual mode (status=%lu)\n", status);
- return;
- }
-
- set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
-
- /*
- * Now that EFI is in virtual mode, we call the EFI functions more
- * efficiently:
- */
- efi.get_time = virt_get_time;
- efi.set_time = virt_set_time;
- efi.get_wakeup_time = virt_get_wakeup_time;
- efi.set_wakeup_time = virt_set_wakeup_time;
- efi.get_variable = virt_get_variable;
- efi.get_next_variable = virt_get_next_variable;
- efi.set_variable = virt_set_variable;
- efi.get_next_high_mono_count = virt_get_next_high_mono_count;
- efi.reset_system = virt_reset_system;
-}
-
-/*
- * Walk the EFI memory map looking for the I/O port range. There can only be
- * one entry of this type, other I/O port ranges should be described via ACPI.
- */
-u64
-efi_get_iobase (void)
-{
- 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;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
- if (md->type == EFI_MEMORY_MAPPED_IO_PORT_SPACE) {
- if (md->attribute & EFI_MEMORY_UC)
- return md->phys_addr;
- }
- }
- return 0;
-}
-
-static struct kern_memdesc *
-kern_memory_descriptor (unsigned long phys_addr)
-{
- struct kern_memdesc *md;
-
- for (md = kern_memmap; md->start != ~0UL; md++) {
- if (phys_addr - md->start < (md->num_pages << EFI_PAGE_SHIFT))
- return md;
- }
- return NULL;
-}
-
-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;
- 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;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
-
- if (phys_addr - md->phys_addr < efi_md_size(md))
- return md;
- }
- return NULL;
-}
-
-static int
-efi_memmap_intersects (unsigned long phys_addr, unsigned long size)
-{
- void *efi_map_start, *efi_map_end, *p;
- efi_memory_desc_t *md;
- u64 efi_desc_size;
- unsigned long end;
-
- 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;
-
- end = phys_addr + size;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
- if (md->phys_addr < end && efi_md_end(md) > phys_addr)
- return 1;
- }
- return 0;
-}
-
-int
-efi_mem_type (unsigned long phys_addr)
-{
- efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
-
- if (md)
- return md->type;
- return -EINVAL;
-}
-
-u64
-efi_mem_attributes (unsigned long phys_addr)
-{
- efi_memory_desc_t *md = efi_memory_descriptor(phys_addr);
-
- if (md)
- return md->attribute;
- return 0;
-}
-EXPORT_SYMBOL(efi_mem_attributes);
-
-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; /* never reached */
-}
-
-u64
-kern_mem_attribute (unsigned long phys_addr, unsigned long size)
-{
- unsigned long end = phys_addr + size;
- struct kern_memdesc *md;
- u64 attr;
-
- /*
- * This is a hack for ioremap calls before we set up kern_memmap.
- * Maybe we should do efi_memmap_init() earlier instead.
- */
- 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 = kmd_end(md);
-
- if (end <= md_end)
- return attr;
-
- md = kern_memory_descriptor(md_end);
- if (!md || md->attribute != attr)
- return 0;
- } while (md);
- return 0; /* never reached */
-}
-
-int
-valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size)
-{
- 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/arch/ia64/aliasing.rst.
- */
- attr = kern_mem_attribute(phys_addr, size);
- if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
- return 1;
- return 0;
-}
-
-int
-valid_mmap_phys_addr_range (unsigned long pfn, unsigned long size)
-{
- unsigned long phys_addr = pfn << PAGE_SHIFT;
- u64 attr;
-
- attr = efi_mem_attribute(phys_addr, size);
-
- /*
- * /dev/mem mmap uses normal user pages, so we don't need the entire
- * granule, but the entire region we're mapping must support the same
- * attribute.
- */
- if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
- return 1;
-
- /*
- * Intel firmware doesn't tell us about all the MMIO regions, so
- * in general we have to allow mmap requests. But if EFI *does*
- * tell us about anything inside this region, we should deny it.
- * The user can always map a smaller region to avoid the overlap.
- */
- if (efi_memmap_intersects(phys_addr, size))
- return 0;
-
- 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;
-
- /*
- * 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
-efi_uart_console_only(void)
-{
- efi_status_t status;
- char *s, name[] = "ConOut";
- efi_guid_t guid = EFI_GLOBAL_VARIABLE_GUID;
- efi_char16_t *utf16, name_utf16[32];
- unsigned char data[1024];
- unsigned long size = sizeof(data);
- struct efi_generic_dev_path *hdr, *end_addr;
- int uart = 0;
-
- /* Convert to UTF-16 */
- utf16 = name_utf16;
- s = name;
- while (*s)
- *utf16++ = *s++ & 0x7f;
- *utf16 = 0;
-
- status = efi.get_variable(name_utf16, &guid, NULL, &size, data);
- if (status != EFI_SUCCESS) {
- printk(KERN_ERR "No EFI %s variable?\n", name);
- return 0;
- }
-
- hdr = (struct efi_generic_dev_path *) data;
- end_addr = (struct efi_generic_dev_path *) ((u8 *) data + size);
- while (hdr < end_addr) {
- if (hdr->type == EFI_DEV_MSG &&
- hdr->sub_type == EFI_DEV_MSG_UART)
- uart = 1;
- else if (hdr->type == EFI_DEV_END_PATH ||
- hdr->type == EFI_DEV_END_PATH2) {
- if (!uart)
- return 0;
- if (hdr->sub_type == EFI_DEV_END_ENTIRE)
- return 1;
- uart = 0;
- }
- hdr = (struct efi_generic_dev_path *)((u8 *) hdr + hdr->length);
- }
- printk(KERN_ERR "Malformed %s value\n", name);
- return 0;
-}
-
-/*
- * Look for the first granule aligned memory descriptor memory
- * that is big enough to hold EFI memory map. Make sure this
- * descriptor is at least granule sized so it does not get trimmed
- */
-struct kern_memdesc *
-find_memmap_space (void)
-{
- u64 contig_low=0, contig_high=0;
- u64 as = 0, ae;
- void *efi_map_start, *efi_map_end, *p, *q;
- efi_memory_desc_t *md, *pmd = NULL, *check_md;
- u64 space_needed, efi_desc_size;
- unsigned long total_mem = 0;
-
- 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;
-
- /*
- * Worst case: we need 3 kernel descriptors for each efi descriptor
- * (if every entry has a WB part in the middle, and UC head and tail),
- * plus one for the end marker.
- */
- space_needed = sizeof(kern_memdesc_t) *
- (3 * (ia64_boot_param->efi_memmap_size/efi_desc_size) + 1);
-
- for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
- md = p;
- if (!efi_wb(md)) {
- continue;
- }
- if (pmd == NULL || !efi_wb(pmd) ||
- efi_md_end(pmd) != md->phys_addr) {
- contig_low = GRANULEROUNDUP(md->phys_addr);
- contig_high = efi_md_end(md);
- for (q = p + efi_desc_size; q < efi_map_end;
- q += efi_desc_size) {
- check_md = q;
- if (!efi_wb(check_md))
- break;
- if (contig_high != check_md->phys_addr)
- break;
- contig_high = efi_md_end(check_md);
- }
- contig_high = GRANULEROUNDDOWN(contig_high);
- }
- if (!is_memory_available(md) || md->type == EFI_LOADER_DATA)
- continue;
-
- /* Round ends inward to granule boundaries */
- as = max(contig_low, md->phys_addr);
- ae = min(contig_high, efi_md_end(md));
-
- /* keep within max_addr= and min_addr= command line arg */
- as = max(as, min_addr);
- ae = min(ae, max_addr);
- if (ae <= as)
- continue;
-
- /* avoid going over mem= command line arg */
- if (total_mem + (ae - as) > mem_limit)
- ae -= total_mem + (ae - as) - mem_limit;
-
- if (ae <= as)
- continue;
-
- if (ae - as > space_needed)
- break;
- }
- if (p >= efi_map_end)
- panic("Can't allocate space for kernel memory descriptors");
-
- return __va(as);
-}
-
-/*
- * Walk the EFI memory map and gather all memory available for kernel
- * to use. We can allocate partial granules only if the unavailable
- * parts exist, and are WB.
- */
-unsigned long
-efi_memmap_init(u64 *s, u64 *e)
-{
- struct kern_memdesc *k, *prev = NULL;
- u64 contig_low=0, contig_high=0;
- u64 as, ae, lim;
- void *efi_map_start, *efi_map_end, *p, *q;
- efi_memory_desc_t *md, *pmd = NULL, *check_md;
- u64 efi_desc_size;
- unsigned long total_mem = 0;
-
- k = kern_memmap = find_memmap_space();
-
- 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;
-
- for (p = efi_map_start; p < efi_map_end; pmd = md, p += efi_desc_size) {
- md = p;
- if (!efi_wb(md)) {
- if (efi_uc(md) &&
- (md->type == EFI_CONVENTIONAL_MEMORY ||
- md->type == EFI_BOOT_SERVICES_DATA)) {
- k->attribute = EFI_MEMORY_UC;
- k->start = md->phys_addr;
- k->num_pages = md->num_pages;
- k++;
- }
- continue;
- }
- if (pmd == NULL || !efi_wb(pmd) ||
- efi_md_end(pmd) != md->phys_addr) {
- contig_low = GRANULEROUNDUP(md->phys_addr);
- contig_high = efi_md_end(md);
- for (q = p + efi_desc_size; q < efi_map_end;
- q += efi_desc_size) {
- check_md = q;
- if (!efi_wb(check_md))
- break;
- if (contig_high != check_md->phys_addr)
- break;
- contig_high = efi_md_end(check_md);
- }
- contig_high = GRANULEROUNDDOWN(contig_high);
- }
- if (!is_memory_available(md))
- continue;
-
- /*
- * Round ends inward to granule boundaries
- * Give trimmings to uncached allocator
- */
- if (md->phys_addr < contig_low) {
- lim = min(efi_md_end(md), contig_low);
- if (efi_uc(md)) {
- if (k > kern_memmap &&
- (k-1)->attribute == EFI_MEMORY_UC &&
- kmd_end(k-1) == md->phys_addr) {
- (k-1)->num_pages +=
- (lim - md->phys_addr)
- >> EFI_PAGE_SHIFT;
- } else {
- k->attribute = EFI_MEMORY_UC;
- k->start = md->phys_addr;
- k->num_pages = (lim - md->phys_addr)
- >> EFI_PAGE_SHIFT;
- k++;
- }
- }
- as = contig_low;
- } else
- as = md->phys_addr;
-
- if (efi_md_end(md) > contig_high) {
- lim = max(md->phys_addr, contig_high);
- if (efi_uc(md)) {
- if (lim == md->phys_addr && k > kern_memmap &&
- (k-1)->attribute == EFI_MEMORY_UC &&
- kmd_end(k-1) == md->phys_addr) {
- (k-1)->num_pages += md->num_pages;
- } else {
- k->attribute = EFI_MEMORY_UC;
- k->start = lim;
- k->num_pages = (efi_md_end(md) - lim)
- >> EFI_PAGE_SHIFT;
- k++;
- }
- }
- ae = contig_high;
- } else
- ae = efi_md_end(md);
-
- /* keep within max_addr= and min_addr= command line arg */
- as = max(as, min_addr);
- ae = min(ae, max_addr);
- if (ae <= as)
- continue;
-
- /* avoid going over mem= command line arg */
- if (total_mem + (ae - as) > mem_limit)
- ae -= total_mem + (ae - as) - mem_limit;
-
- if (ae <= as)
- continue;
- if (prev && kmd_end(prev) == md->phys_addr) {
- prev->num_pages += (ae - as) >> EFI_PAGE_SHIFT;
- total_mem += ae - as;
- continue;
- }
- k->attribute = EFI_MEMORY_WB;
- k->start = as;
- k->num_pages = (ae - as) >> EFI_PAGE_SHIFT;
- total_mem += ae - as;
- prev = k++;
- }
- k->start = ~0L; /* end-marker */
-
- /* reserve the memory we are using for kern_memmap */
- *s = (u64)kern_memmap;
- *e = (u64)++k;
-
- return total_mem;
-}
-
-void
-efi_initialize_iomem_resources(struct resource *code_resource,
- struct resource *data_resource,
- struct resource *bss_resource)
-{
- struct resource *res;
- void *efi_map_start, *efi_map_end, *p;
- efi_memory_desc_t *md;
- u64 efi_desc_size;
- char *name;
- unsigned long flags, desc;
-
- 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;
-
- res = NULL;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
-
- if (md->num_pages == 0) /* should not happen */
- continue;
-
- flags = IORESOURCE_MEM | IORESOURCE_BUSY;
- desc = IORES_DESC_NONE;
-
- switch (md->type) {
-
- case EFI_MEMORY_MAPPED_IO:
- case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
- continue;
-
- case EFI_LOADER_CODE:
- case EFI_LOADER_DATA:
- case EFI_BOOT_SERVICES_DATA:
- case EFI_BOOT_SERVICES_CODE:
- case EFI_CONVENTIONAL_MEMORY:
- if (md->attribute & EFI_MEMORY_WP) {
- name = "System ROM";
- flags |= IORESOURCE_READONLY;
- } else if (md->attribute == EFI_MEMORY_UC) {
- name = "Uncached RAM";
- } else {
- name = "System RAM";
- flags |= IORESOURCE_SYSRAM;
- }
- break;
-
- case EFI_ACPI_MEMORY_NVS:
- name = "ACPI Non-volatile Storage";
- desc = IORES_DESC_ACPI_NV_STORAGE;
- break;
-
- case EFI_UNUSABLE_MEMORY:
- name = "reserved";
- flags |= IORESOURCE_DISABLED;
- break;
-
- case EFI_PERSISTENT_MEMORY:
- name = "Persistent Memory";
- desc = IORES_DESC_PERSISTENT_MEMORY;
- break;
-
- case EFI_RESERVED_TYPE:
- case EFI_RUNTIME_SERVICES_CODE:
- case EFI_RUNTIME_SERVICES_DATA:
- case EFI_ACPI_RECLAIM_MEMORY:
- default:
- name = "reserved";
- break;
- }
-
- if ((res = kzalloc(sizeof(struct resource),
- GFP_KERNEL)) == NULL) {
- printk(KERN_ERR
- "failed to allocate resource for iomem\n");
- return;
- }
-
- res->name = name;
- res->start = md->phys_addr;
- res->end = md->phys_addr + efi_md_size(md) - 1;
- res->flags = flags;
- res->desc = desc;
-
- if (insert_resource(&iomem_resource, res) < 0)
- kfree(res);
- else {
- /*
- * We don't know which region contains
- * kernel data so we try it repeatedly and
- * let the resource manager test it.
- */
- insert_resource(res, code_resource);
- insert_resource(res, data_resource);
- insert_resource(res, bss_resource);
-#ifdef CONFIG_KEXEC
- insert_resource(res, &efi_memmap_res);
- insert_resource(res, &boot_param_res);
- if (crashk_res.end > crashk_res.start)
- insert_resource(res, &crashk_res);
-#endif
- }
- }
-}
-
-#ifdef CONFIG_KEXEC
-/* find a block of memory aligned to 64M exclude reserved regions
- rsvd_regions are sorted
- */
-unsigned long __init
-kdump_find_rsvd_region (unsigned long size, struct rsvd_region *r, int n)
-{
- int i;
- u64 start, end;
- u64 alignment = 1UL << _PAGE_SIZE_64M;
- 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;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
- if (!efi_wb(md))
- continue;
- start = ALIGN(md->phys_addr, alignment);
- end = efi_md_end(md);
- for (i = 0; i < n; i++) {
- if (__pa(r[i].start) >= start && __pa(r[i].end) < end) {
- if (__pa(r[i].start) > start + size)
- return start;
- start = ALIGN(__pa(r[i].end), alignment);
- if (i < n-1 &&
- __pa(r[i+1].start) < start + size)
- continue;
- else
- break;
- }
- }
- if (end > start + size)
- return start;
- }
-
- printk(KERN_WARNING
- "Cannot reserve 0x%lx byte of memory for crashdump\n", size);
- return ~0UL;
-}
-#endif
-
-#ifdef CONFIG_CRASH_DUMP
-/* locate the size find a the descriptor at a certain address */
-unsigned long __init
-vmcore_find_descriptor_size (unsigned long address)
-{
- void *efi_map_start, *efi_map_end, *p;
- efi_memory_desc_t *md;
- u64 efi_desc_size;
- unsigned long ret = 0;
-
- 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;
-
- for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
- md = p;
- if (efi_wb(md) && md->type == EFI_LOADER_DATA
- && md->phys_addr == address) {
- ret = efi_md_size(md);
- break;
- }
- }
-
- if (ret == 0)
- printk(KERN_WARNING "Cannot locate EFI vmcore descriptor\n");
-
- return ret;
-}
-#endif
-
-char *efi_systab_show_arch(char *str)
-{
- if (mps_phys != EFI_INVALID_TABLE_ADDR)
- str += sprintf(str, "MPS=0x%lx\n", mps_phys);
- if (hcdp_phys != EFI_INVALID_TABLE_ADDR)
- str += sprintf(str, "HCDP=0x%lx\n", hcdp_phys);
- return str;
-}