Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/arch/ia64/kernel/efi.c b/arch/ia64/kernel/efi.c
new file mode 100644
index 0000000..4a3b1aa
--- /dev/null
+++ b/arch/ia64/kernel/efi.c
@@ -0,0 +1,832 @@
+/*
+ * 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>
+ *
+ * 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/config.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/efi.h>
+
+#include <asm/io.h>
+#include <asm/kregs.h>
+#include <asm/meminit.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/mca.h>
+
+#define EFI_DEBUG 0
+
+extern efi_status_t efi_call_phys (void *, ...);
+
+struct efi efi;
+EXPORT_SYMBOL(efi);
+static efi_runtime_services_t *runtime;
+static unsigned long mem_limit = ~0UL, max_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, unsigned long 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 timespec *ts)
+{
+ efi_time_t tm;
+
+ memset(ts, 0, sizeof(ts));
+ if ((*efi.get_time)(&tm, NULL) != EFI_SUCCESS)
+ return;
+
+ ts->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute, tm.second);
+ ts->tv_nsec = tm.nanosecond;
+}
+
+static int
+is_available_memory (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;
+}
+
+/*
+ * Trim descriptor MD so its starts at address START_ADDR. If the descriptor covers
+ * memory that is normally available to the kernel, issue a warning that some memory
+ * is being ignored.
+ */
+static void
+trim_bottom (efi_memory_desc_t *md, u64 start_addr)
+{
+ u64 num_skipped_pages;
+
+ if (md->phys_addr >= start_addr || !md->num_pages)
+ return;
+
+ num_skipped_pages = (start_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
+ if (num_skipped_pages > md->num_pages)
+ num_skipped_pages = md->num_pages;
+
+ if (is_available_memory(md))
+ printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
+ "at 0x%lx\n", __FUNCTION__,
+ (num_skipped_pages << EFI_PAGE_SHIFT) >> 10,
+ md->phys_addr, start_addr - IA64_GRANULE_SIZE);
+ /*
+ * NOTE: Don't set md->phys_addr to START_ADDR because that could cause the memory
+ * descriptor list to become unsorted. In such a case, md->num_pages will be
+ * zero, so the Right Thing will happen.
+ */
+ md->phys_addr += num_skipped_pages << EFI_PAGE_SHIFT;
+ md->num_pages -= num_skipped_pages;
+}
+
+static void
+trim_top (efi_memory_desc_t *md, u64 end_addr)
+{
+ u64 num_dropped_pages, md_end_addr;
+
+ md_end_addr = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT);
+
+ if (md_end_addr <= end_addr || !md->num_pages)
+ return;
+
+ num_dropped_pages = (md_end_addr - end_addr) >> EFI_PAGE_SHIFT;
+ if (num_dropped_pages > md->num_pages)
+ num_dropped_pages = md->num_pages;
+
+ if (is_available_memory(md))
+ printk(KERN_NOTICE "efi.%s: ignoring %luKB of memory at 0x%lx due to granule hole "
+ "at 0x%lx\n", __FUNCTION__,
+ (num_dropped_pages << EFI_PAGE_SHIFT) >> 10,
+ md->phys_addr, end_addr);
+ md->num_pages -= num_dropped_pages;
+}
+
+/*
+ * Walks the EFI memory map and calls 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)
+{
+ int prev_valid = 0;
+ struct range {
+ u64 start;
+ u64 end;
+ } prev, curr;
+ void *efi_map_start, *efi_map_end, *p, *q;
+ efi_memory_desc_t *md, *check_md;
+ u64 efi_desc_size, start, end, granule_addr, last_granule_addr, first_non_wb_addr = 0;
+ 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;
+
+ for (p = efi_map_start; p < efi_map_end; p += efi_desc_size) {
+ md = p;
+
+ /* skip over non-WB memory descriptors; that's all we're interested in... */
+ if (!(md->attribute & EFI_MEMORY_WB))
+ continue;
+
+ /*
+ * granule_addr is the base of md's first granule.
+ * [granule_addr - first_non_wb_addr) is guaranteed to
+ * be contiguous WB memory.
+ */
+ granule_addr = GRANULEROUNDDOWN(md->phys_addr);
+ first_non_wb_addr = max(first_non_wb_addr, granule_addr);
+
+ if (first_non_wb_addr < md->phys_addr) {
+ trim_bottom(md, granule_addr + IA64_GRANULE_SIZE);
+ granule_addr = GRANULEROUNDDOWN(md->phys_addr);
+ first_non_wb_addr = max(first_non_wb_addr, granule_addr);
+ }
+
+ for (q = p; q < efi_map_end; q += efi_desc_size) {
+ check_md = q;
+
+ if ((check_md->attribute & EFI_MEMORY_WB) &&
+ (check_md->phys_addr == first_non_wb_addr))
+ first_non_wb_addr += check_md->num_pages << EFI_PAGE_SHIFT;
+ else
+ break; /* non-WB or hole */
+ }
+
+ last_granule_addr = GRANULEROUNDDOWN(first_non_wb_addr);
+ if (last_granule_addr < md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT))
+ trim_top(md, last_granule_addr);
+
+ if (is_available_memory(md)) {
+ if (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) >= max_addr) {
+ if (md->phys_addr >= max_addr)
+ continue;
+ md->num_pages = (max_addr - md->phys_addr) >> EFI_PAGE_SHIFT;
+ first_non_wb_addr = max_addr;
+ }
+
+ if (total_mem >= mem_limit)
+ continue;
+
+ if (total_mem + (md->num_pages << EFI_PAGE_SHIFT) > mem_limit) {
+ unsigned long limit_addr = md->phys_addr;
+
+ limit_addr += mem_limit - total_mem;
+ limit_addr = GRANULEROUNDDOWN(limit_addr);
+
+ if (md->phys_addr > limit_addr)
+ continue;
+
+ md->num_pages = (limit_addr - md->phys_addr) >>
+ EFI_PAGE_SHIFT;
+ first_non_wb_addr = max_addr = md->phys_addr +
+ (md->num_pages << EFI_PAGE_SHIFT);
+ }
+ total_mem += (md->num_pages << EFI_PAGE_SHIFT);
+
+ if (md->num_pages == 0)
+ continue;
+
+ curr.start = PAGE_OFFSET + md->phys_addr;
+ curr.end = curr.start + (md->num_pages << EFI_PAGE_SHIFT);
+
+ if (!prev_valid) {
+ prev = curr;
+ prev_valid = 1;
+ } else {
+ if (curr.start < prev.start)
+ printk(KERN_ERR "Oops: EFI memory table not ordered!\n");
+
+ if (prev.end == curr.start) {
+ /* merge two consecutive memory ranges */
+ prev.end = curr.end;
+ } else {
+ start = PAGE_ALIGN(prev.start);
+ end = prev.end & PAGE_MASK;
+ if ((end > start) && (*callback)(start, end, arg) < 0)
+ return;
+ prev = curr;
+ }
+ }
+ }
+ }
+ if (prev_valid) {
+ start = PAGE_ALIGN(prev.start);
+ end = prev.end & PAGE_MASK;
+ if (end > start)
+ (*callback)(start, end, arg);
+ }
+}
+
+/*
+ * Look for the PAL_CODE region reported by EFI and maps 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 @ %lx\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",
+ __FUNCTION__);
+ continue;
+ }
+
+ if (md->num_pages << EFI_PAGE_SHIFT > IA64_GRANULE_SIZE)
+ panic("Woah! 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%lx-0x%lx) into [0x%lx-0x%lx)\n",
+ smp_processor_id(), md->phys_addr,
+ md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
+ vaddr & mask, (vaddr & mask) + IA64_GRANULE_SIZE);
+#endif
+ return __va(md->phys_addr);
+ }
+ printk(KERN_WARNING "%s: no PAL-code memory-descriptor found",
+ __FUNCTION__);
+ return NULL;
+}
+
+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 */
+ ia64_srlz_i();
+}
+
+void __init
+efi_init (void)
+{
+ void *efi_map_start, *efi_map_end;
+ efi_config_table_t *config_tables;
+ efi_char16_t *c16;
+ u64 efi_desc_size;
+ char *cp, *end, vendor[100] = "unknown";
+ extern char saved_command_line[];
+ int i;
+
+ /* it's too early to be able to use the standard kernel command line support... */
+ for (cp = saved_command_line; *cp; ) {
+ if (memcmp(cp, "mem=", 4) == 0) {
+ cp += 4;
+ mem_limit = memparse(cp, &end);
+ if (end != cp)
+ break;
+ cp = end;
+ } else if (memcmp(cp, "max_addr=", 9) == 0) {
+ cp += 9;
+ max_addr = GRANULEROUNDDOWN(memparse(cp, &end));
+ if (end != cp)
+ break;
+ cp = end;
+ } else {
+ while (*cp != ' ' && *cp)
+ ++cp;
+ while (*cp == ' ')
+ ++cp;
+ }
+ }
+ if (max_addr != ~0UL)
+ printk(KERN_INFO "Ignoring memory above %luMB\n", max_addr >> 20);
+
+ efi.systab = __va(ia64_boot_param->efi_systab);
+
+ /*
+ * Verify the EFI Table
+ */
+ if (efi.systab == NULL)
+ panic("Woah! Can't find EFI system table.\n");
+ if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+ panic("Woah! EFI system table signature incorrect\n");
+ if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
+ printk(KERN_WARNING "Warning: EFI system table major version mismatch: "
+ "got %d.%02d, expected %d.%02d\n",
+ efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff,
+ EFI_SYSTEM_TABLE_REVISION >> 16, EFI_SYSTEM_TABLE_REVISION & 0xffff);
+
+ config_tables = __va(efi.systab->tables);
+
+ /* Show what we know for posterity */
+ c16 = __va(efi.systab->fw_vendor);
+ if (c16) {
+ for (i = 0;i < (int) sizeof(vendor) && *c16; ++i)
+ vendor[i] = *c16++;
+ vendor[i] = '\0';
+ }
+
+ printk(KERN_INFO "EFI v%u.%.02u by %s:",
+ efi.systab->hdr.revision >> 16, efi.systab->hdr.revision & 0xffff, vendor);
+
+ for (i = 0; i < (int) efi.systab->nr_tables; i++) {
+ if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
+ efi.mps = __va(config_tables[i].table);
+ printk(" MPS=0x%lx", config_tables[i].table);
+ } else if (efi_guidcmp(config_tables[i].guid, ACPI_20_TABLE_GUID) == 0) {
+ efi.acpi20 = __va(config_tables[i].table);
+ printk(" ACPI 2.0=0x%lx", config_tables[i].table);
+ } else if (efi_guidcmp(config_tables[i].guid, ACPI_TABLE_GUID) == 0) {
+ efi.acpi = __va(config_tables[i].table);
+ printk(" ACPI=0x%lx", config_tables[i].table);
+ } else if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
+ efi.smbios = __va(config_tables[i].table);
+ printk(" SMBIOS=0x%lx", config_tables[i].table);
+ } else if (efi_guidcmp(config_tables[i].guid, SAL_SYSTEM_TABLE_GUID) == 0) {
+ efi.sal_systab = __va(config_tables[i].table);
+ printk(" SALsystab=0x%lx", config_tables[i].table);
+ } else if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
+ efi.hcdp = __va(config_tables[i].table);
+ printk(" HCDP=0x%lx", config_tables[i].table);
+ }
+ }
+ printk("\n");
+
+ 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;
+
+ for (i = 0, p = efi_map_start; p < efi_map_end; ++i, p += efi_desc_size) {
+ md = p;
+ printk("mem%02u: type=%u, attr=0x%lx, range=[0x%016lx-0x%016lx) (%luMB)\n",
+ i, md->type, md->attribute, md->phys_addr,
+ md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT),
+ md->num_pages >> (20 - EFI_PAGE_SHIFT));
+ }
+ }
+#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;
+ }
+
+ /*
+ * 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;
+}
+
+u32
+efi_mem_type (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 < (md->num_pages << EFI_PAGE_SHIFT))
+ return md->type;
+ }
+ return 0;
+}
+
+u64
+efi_mem_attributes (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 < (md->num_pages << EFI_PAGE_SHIFT))
+ return md->attribute;
+ }
+ return 0;
+}
+EXPORT_SYMBOL(efi_mem_attributes);
+
+int
+valid_phys_addr_range (unsigned long phys_addr, unsigned long *size)
+{
+ 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 < (md->num_pages << EFI_PAGE_SHIFT)) {
+ if (!(md->attribute & EFI_MEMORY_WB))
+ return 0;
+
+ if (*size > md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr)
+ *size = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - phys_addr;
+ return 1;
+ }
+ }
+ return 0;
+}
+
+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;
+}