[resend] [updated patch] for efi support in ia32 kernels
From: Matt Tolentino
Date: Fri Oct 03 2003 - 18:09:20 EST
Well, looks like the first mail got munged. Here's the original mail with the patch inline.... Sorry for the trash.
matt
Attached is another patch that enables EFI boot-up support in ia32 =
kernels. This one has numerous changes based on the various comments =
and suggestions made on the last one several weeks ago. The patch is =
against 2.6.0-test6-mm2. =20
This patch departs from the last in that I am no longer adding separate =
boot parameters at the end of the the empty_zero_page; rather, based on =
Eric's suggestion, I've added EFI parameters via offset grouped with the =
rest of the existing boot parameters. This allows the reuse of several =
parameters which were redundant (command-line, initrd, etc.). This also =
simplifies some of the code in setup_arch(). =20
In order to continue to determine whether the kernel should initialize =
using EFI tables, I've temporarily added a check on the LOADER_TYPE boot =
parameter. Although I haven't requested that elilo be assigned an id =
for this yet, I've used this to determine whether the kernel should use =
the EFI initialization path as well as a check to see if the EFI_SYSTAB =
boot parameter contains anything. If someone has a better suggestion =
for determining this, I'm open...
This patch also uses the existing ioremapping functions to map the efi =
tables into kernel virtual address space. I've added an option such =
that I could use Dave Hansen's boot_ioremap() before paging_init(). =
After paging_init, I then remap the efi memmap using bt_ioremap for use =
later. This has eliminated the need for several functions...thanks for =
the suggestions and thanks for your help Dave. Still this could use a =
look-see. =20
Something else that I'd like to solicit suggestions on is how to deal =
with CONFIG_ACPI_EFI. One of the goals of this patch is to enable the =
kernel to "just know" at boot time when to use EFI information to =
initialize. That way, the same kernel image would theoretically still =
boot on existing systems with a different BIOS. I think this patch =
accomplishes that goal to some degree, but how best to deal with =
when/when not to look at the EFI config table for the RSDP is still =
dealt with at compile time. I'd like to dynamically determine this as =
well, but am not sure of the best way...suggestions? Len? Andrew?
Note, I'm still working on verifying this works properly on a system =
with >4GB system memory, as well as with the 4G/4G split (hence the =
reason this is against the -mm kernel)...hopefully, I'll be able to =
steal some time on one of those monsters next week.
Comments and suggestions are welcome...
thanks,
matt
diff -urN linux-2.6.0-test6-mm2/arch/i386/Kconfig linux-2.6.0-test6-mm2-efi/arch/i386/Kconfig
--- linux-2.6.0-test6-mm2/arch/i386/Kconfig 2003-10-03 11:50:44.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/Kconfig 2003-10-03 10:10:40.000000000 -0700
@@ -840,8 +840,9 @@
# turning this on wastes a bunch of space.
# Summit needs it only when NUMA is on
config BOOT_IOREMAP
- bool
- depends on ((X86_SUMMIT || X86_GENERICARCH) && NUMA)
+ bool
+ depends on X86_PC
+# depends on (((X86_SUMMIT || X86_GENERICARCH) && NUMA)) || X86_GENERICARCH
default y
endmenu
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/acpi/boot.c linux-2.6.0-test6-mm2-efi/arch/i386/kernel/acpi/boot.c
--- linux-2.6.0-test6-mm2/arch/i386/kernel/acpi/boot.c 2003-10-03 11:50:44.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/acpi/boot.c 2003-10-03 10:10:40.000000000 -0700
@@ -26,6 +26,7 @@
#include <linux/init.h>
#include <linux/config.h>
#include <linux/acpi.h>
+#include <linux/efi.h>
#include <asm/pgalloc.h>
#include <asm/io_apic.h>
#include <asm/apic.h>
@@ -295,7 +296,11 @@
acpi_find_rsdp (void)
{
unsigned long rsdp_phys = 0;
-
+
+ if (efi.acpi20)
+ return __pa(efi.acpi20);
+ else if (efi.acpi)
+ return __pa(efi.acpi);
/*
* Scan memory looking for the RSDP signature. First search EBDA (low
* memory) paragraphs and then search upper memory (E0000-FFFFF).
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/efi.c linux-2.6.0-test6-mm2-efi/arch/i386/kernel/efi.c
--- linux-2.6.0-test6-mm2/arch/i386/kernel/efi.c 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/efi.c 2003-10-03 11:44:45.000000000 -0700
@@ -0,0 +1,606 @@
+/*
+ * Extensible Firmware Interface
+ *
+ * Based on Extensible Firmware Interface Specification version 1.0
+ *
+ * Copyright (C) 1999 VA Linux Systems
+ * Copyright (C) 1999 Walt Drummond <drummond@xxxxxxxxxxx>
+ * Copyright (C) 1999-2002 Hewlett-Packard Co.
+ * David Mosberger-Tang <davidm@xxxxxxxxxx>
+ * Stephane Eranian <eranian@xxxxxxxxxx>
+ *
+ * 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@xxxxxxxxx>
+ * Skip non-WB memory and ignore empty memory ranges.
+ */
+
+#include <linux/config.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/mm.h>
+#include <linux/types.h>
+#include <linux/time.h>
+#include <linux/spinlock.h>
+#include <linux/bootmem.h>
+#include <linux/ioport.h>
+#include <linux/proc_fs.h>
+#include <linux/efi.h>
+
+#include <asm/setup.h>
+#include <asm/io.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+#include <asm/processor.h>
+#include <asm/desc.h>
+#include <asm/pgalloc.h>
+#include <asm/tlbflush.h>
+
+#define EFI_DEBUG 0
+#define PFX "EFI: "
+
+extern efi_status_t asmlinkage efi_call_phys(void *, ...);
+
+struct efi efi;
+struct efi efi_phys __initdata;
+struct efi_memory_map memmap __initdata;
+
+/*
+ * We require an early boot_ioremap mapping mechanism initially
+ */
+extern void * boot_ioremap(unsigned long, unsigned long);
+
+/*
+ * efi_dir is allocated here, but the directory isn't created
+ * here, as proc_mkdir() doesn't work this early in the bootup
+ * process. Therefore, each module, like efivars, must test for
+ * if (!efi_dir) efi_dir = proc_mkdir("efi", NULL);
+ * prior to creating their own entries under /proc/efi.
+ */
+#ifdef CONFIG_PROC_FS
+struct proc_dir_entry *efi_dir;
+#endif
+
+
+/*
+ * To make EFI call EFI runtime service in physical addressing mode we need
+ * prelog/epilog before/after the invocation to disable interrupt, to
+ * claim EFI runtime service handler exclusively and to duplicate a memory in
+ * low memory space say 0 - 3G.
+ */
+
+static unsigned long efi_rt_eflags;
+static spinlock_t efi_rt_lock = SPIN_LOCK_UNLOCKED;
+static pgd_t efi_bak_pg_dir_pointer[2];
+
+static void efi_call_phys_prelog(void)
+{
+ unsigned long cr4;
+ unsigned long temp;
+
+ spin_lock(&efi_rt_lock);
+ local_irq_save(efi_rt_eflags);
+
+ /*
+ * If I don't have PSE, I should just duplicate two entries in page
+ * directory. If I have PSE, I just need to duplicate one entry in
+ * page directory.
+ */
+ __asm__ __volatile__("movl %%cr4, %0":"=r"(cr4));
+
+ if (cr4 & X86_CR4_PSE) {
+ efi_bak_pg_dir_pointer[0].pgd =
+ swapper_pg_dir[pgd_index(0)].pgd;
+ swapper_pg_dir[0].pgd =
+ swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
+ } else {
+ efi_bak_pg_dir_pointer[0].pgd =
+ swapper_pg_dir[pgd_index(0)].pgd;
+ efi_bak_pg_dir_pointer[1].pgd =
+ swapper_pg_dir[pgd_index(0x400000)].pgd;
+ swapper_pg_dir[pgd_index(0)].pgd =
+ swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
+ temp = PAGE_OFFSET + 0x400000;
+ swapper_pg_dir[pgd_index(0x400000)].pgd =
+ swapper_pg_dir[pgd_index(temp)].pgd;
+ }
+
+ /*
+ * After the lock is released, the original page table is restored.
+ */
+ local_flush_tlb();
+
+ cpu_gdt_descr[0].address = __pa(cpu_gdt_descr[0].address);
+ __asm__ __volatile__("lgdt %0":"=m"
+ (*(struct Xgt_desc_struct *) __pa(&cpu_gdt_descr[0])));
+}
+
+static void efi_call_phys_epilog(void)
+{
+ unsigned long cr4;
+
+ cpu_gdt_descr[0].address =
+ (unsigned long) __va(cpu_gdt_descr[0].address);
+ __asm__ __volatile__("lgdt %0":"=m"(cpu_gdt_descr));
+ __asm__ __volatile__("movl %%cr4, %0":"=r"(cr4));
+
+ if (cr4 & X86_CR4_PSE) {
+ swapper_pg_dir[pgd_index(0)].pgd =
+ efi_bak_pg_dir_pointer[0].pgd;
+ } else {
+ swapper_pg_dir[pgd_index(0)].pgd =
+ efi_bak_pg_dir_pointer[0].pgd;
+ swapper_pg_dir[pgd_index(0x400000)].pgd =
+ efi_bak_pg_dir_pointer[1].pgd;
+ }
+
+ /*
+ * After the lock is released, the original page table is restored.
+ */
+ local_flush_tlb();
+
+ local_irq_restore(efi_rt_eflags);
+ spin_unlock(&efi_rt_lock);
+}
+
+static efi_status_t
+phys_efi_set_virtual_address_map(unsigned long memory_map_size,
+ unsigned long descriptor_size,
+ u32 descriptor_version,
+ efi_memory_desc_t *virtual_map)
+{
+ efi_status_t status;
+
+ efi_call_phys_prelog();
+ status = efi_call_phys(efi_phys.set_virtual_address_map,
+ memory_map_size, descriptor_size,
+ descriptor_version, virtual_map);
+ efi_call_phys_epilog();
+ return status;
+}
+
+efi_status_t
+phys_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc)
+{
+ efi_status_t status;
+
+ efi_call_phys_prelog();
+ status = efi_call_phys(efi_phys.get_time, tm, tc);
+ efi_call_phys_epilog();
+ return status;
+}
+
+void efi_gettimeofday(struct timespec *tv)
+{
+ efi_time_t tm;
+
+ memset(tv, 0, sizeof(*tv));
+ if ((*efi.get_time) (&tm, 0) != EFI_SUCCESS)
+ return;
+
+ tv->tv_sec = mktime(tm.year, tm.month, tm.day, tm.hour, tm.minute,
+ tm.second);
+ tv->tv_nsec = tm.nanosecond;
+}
+
+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;
+}
+
+/*
+ * We need to map the EFI memory map again after paging_init().
+ */
+void __init efi_map_memmap(void)
+{
+ memmap.map = NULL;
+
+ memmap.map = (efi_memory_desc_t *)
+ bt_ioremap((unsigned long) memmap.phys_map,
+ (memmap.nr_map * sizeof(efi_memory_desc_t)));
+
+ if (memmap.map == NULL)
+ printk(KERN_ERR PFX "Could not remap the EFI memmap!\n");
+}
+
+void __init print_efi_memmap(void)
+{
+ efi_memory_desc_t *md;
+ int i;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+ printk(KERN_INFO "mem%02u: type=%u, attr=0x%llx, "
+ "range=[0x%016llx-0x%016llx) (%lluMB)\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)));
+ }
+}
+
+/*
+ * Walks the EFI memory map and calls CALLBACK once for each EFI
+ * memory descriptor that has memory that is available for kernel use.
+ */
+void efi_memmap_walk(efi_freemem_callback_t callback, void *arg)
+{
+ int prev_valid = 0;
+ struct range {
+ unsigned long start;
+ unsigned long end;
+ } prev, curr;
+ efi_memory_desc_t *md;
+ unsigned long start, end;
+ int i;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+
+ if ((md->num_pages == 0) || (!is_available_memory(md)))
+ continue;
+
+ curr.start = 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_INFO PFX "Unordered memory map\n");
+ if (prev.end == curr.start)
+ prev.end = curr.end;
+ else {
+ start =
+ (unsigned long) (PAGE_ALIGN(prev.start));
+ end = (unsigned long) (prev.end & PAGE_MASK);
+ if ((end > start)
+ && (*callback) (start, end, arg) < 0)
+ return;
+ prev = curr;
+ }
+ }
+ }
+ if (prev_valid) {
+ start = (unsigned long) PAGE_ALIGN(prev.start);
+ end = (unsigned long) (prev.end & PAGE_MASK);
+ if (end > start)
+ (*callback) (start, end, arg);
+ }
+}
+
+void __init efi_init(void)
+{
+ efi_config_table_t *config_tables;
+ efi_runtime_services_t *runtime;
+ efi_char16_t *c16;
+ char vendor[100] = "unknown";
+ unsigned long num_config_tables;
+ int i = 0;
+
+ memset(&efi, 0, sizeof(efi) );
+ memset(&efi_phys, 0, sizeof(efi_phys));
+
+ efi_phys.systab = EFI_SYSTAB;
+ memmap.phys_map = EFI_MEMMAP;
+ memmap.nr_map = EFI_MEMMAP_SIZE/EFI_MEMDESC_SIZE;
+ memmap.desc_version = EFI_MEMDESC_VERSION;
+
+ efi.systab = (efi_system_table_t *)
+ boot_ioremap((unsigned long) efi_phys.systab,
+ sizeof(efi_system_table_t));
+ /*
+ * Verify the EFI Table
+ */
+ if (efi.systab == NULL)
+ printk(KERN_ERR PFX "Woah! Couldn't map the EFI system table.\n");
+ if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
+ printk(KERN_ERR PFX "Woah! EFI system table signature incorrect\n");
+ if ((efi.systab->hdr.revision ^ EFI_SYSTEM_TABLE_REVISION) >> 16 != 0)
+ printk(KERN_ERR PFX
+ "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);
+ /*
+ * Grab some details from the system table
+ */
+ num_config_tables = efi.systab->nr_tables;
+ config_tables = (efi_config_table_t *)efi.systab->tables;
+ runtime = efi.systab->runtime;
+
+ /*
+ * Show what we know for posterity
+ */
+ c16 = (efi_char16_t *) boot_ioremap(efi.systab->fw_vendor, 2);
+ if (c16) {
+ for (i = 0; i < sizeof(vendor) && *c16; ++i)
+ vendor[i] = *c16++;
+ vendor[i] = '\0';
+ } else
+ printk(KERN_ERR PFX "Could not map the firmware vendor!\n");
+
+ printk(KERN_INFO PFX "EFI v%u.%.02u by %s \n",
+ efi.systab->hdr.revision >> 16,
+ efi.systab->hdr.revision & 0xffff, vendor);
+
+ /*
+ * Let's see what config tables the firmware passed to us.
+ */
+ config_tables = (efi_config_table_t *)
+ boot_ioremap((unsigned long) config_tables,
+ num_config_tables * sizeof(efi_config_table_t));
+
+ if (config_tables == NULL)
+ printk(KERN_ERR PFX "Could not map EFI Configuration Table!\n");
+
+ for (i = 0; i < num_config_tables; i++) {
+ if (efi_guidcmp(config_tables[i].guid, MPS_TABLE_GUID) == 0) {
+ efi.mps = (void *)config_tables[i].table;
+ printk(KERN_INFO " 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(KERN_INFO " 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(KERN_INFO " ACPI=0x%lx ", config_tables[i].table);
+ } else
+ if (efi_guidcmp(config_tables[i].guid, SMBIOS_TABLE_GUID) == 0) {
+ efi.smbios = (void *) config_tables[i].table;
+ printk(KERN_INFO " SMBIOS=0x%lx ", config_tables[i].table);
+ } else
+ if (efi_guidcmp(config_tables[i].guid, HCDP_TABLE_GUID) == 0) {
+ efi.hcdp = (void *)config_tables[i].table;
+ printk(KERN_INFO " HCDP=0x%lx ", config_tables[i].table);
+ } else
+ if (efi_guidcmp(config_tables[i].guid, UGA_IO_PROTOCOL_GUID) == 0) {
+ efi.uga = (void *)config_tables[i].table;
+ printk(KERN_INFO " UGA=0x%lx ", config_tables[i].table);
+ }
+ }
+ printk("\n");
+
+ /*
+ * Check out the runtime services table. We need to map
+ * the runtime services table so that we can grab the physical
+ * address of several of the EFI runtime functions, needed to
+ * set the firmware into virtual mode.
+ */
+
+ runtime = (efi_runtime_services_t *) boot_ioremap((unsigned long)
+ runtime,
+ sizeof(efi_runtime_services_t));
+ if (runtime != NULL) {
+ /*
+ * We will only need *early* access to the following
+ * two EFI runtime services before set_virtual_address_map
+ * is invoked.
+ */
+ efi_phys.get_time = (efi_get_time_t *) runtime->get_time;
+ efi_phys.set_virtual_address_map =
+ (efi_set_virtual_address_map_t *)
+ runtime->set_virtual_address_map;
+ } else
+ printk(KERN_ERR PFX "Could not map the runtime service table!\n");
+
+ /* Map the EFI memory map for use until paging_init() */
+
+ memmap.map = (efi_memory_desc_t *)
+ boot_ioremap((unsigned long) EFI_MEMMAP, EFI_MEMMAP_SIZE);
+
+ if (memmap.map == NULL)
+ printk(KERN_ERR PFX "Could not map the EFI memory map!\n");
+
+ if (EFI_MEMDESC_SIZE != sizeof(efi_memory_desc_t)) {
+ printk(KERN_WARNING PFX "Warning! Kernel-defined memdesc doesn't "
+ "match the one from EFI!\n");
+ }
+#if EFI_DEBUG
+ print_efi_memmap();
+#endif
+}
+
+/*
+ * This function will switch the EFI runtime services to virtual mode.
+ * Essentially, look through the EFI memmap and map every region that
+ * has the runtime attribute bit set in its memory descriptor and update
+ * that memory descriptor with the virtual address obtained from ioremap().
+ * This enables the runtime services to be called without having to
+ * thunk back into physical mode for every invocation.
+ */
+
+void __init efi_enter_virtual_mode(void)
+{
+ efi_memory_desc_t *md;
+ efi_status_t status;
+ int i;
+
+ efi.systab = NULL;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+
+ if (md->attribute & EFI_MEMORY_RUNTIME) {
+ md->virt_addr =
+ (u64) ioremap((unsigned long) md->phys_addr,
+ (unsigned long) (md->num_pages
+ << EFI_PAGE_SHIFT));
+ if (!(unsigned long) md->virt_addr) {
+ printk(KERN_ERR PFX "ioremap of md: 0x%lX failed \n",
+ (unsigned long) md->phys_addr);
+ }
+
+ if (((unsigned long)md->phys_addr <= (unsigned long)efi_phys.systab) && ((unsigned long)efi_phys.systab < md->phys_addr + ((unsigned long) md->num_pages << EFI_PAGE_SHIFT))) {
+ efi.systab = (efi_system_table_t *)
+ ((md->virt_addr - md->phys_addr) +
+ (u64)efi_phys.systab);
+ }
+ }
+ }
+
+ if (!efi.systab)
+ BUG();
+
+ status = phys_efi_set_virtual_address_map(
+ sizeof(efi_memory_desc_t) * memmap.nr_map,
+ sizeof(efi_memory_desc_t),
+ memmap.desc_version,
+ memmap.phys_map);
+
+ if (status != EFI_SUCCESS) {
+ printk (KERN_ALERT "You are screwed! "
+ "Unable to switch EFI into virtual mode "
+ "(status=%lx)\n", status);
+ panic("EFI call to SetVirtualAddressMap() failed!");
+ }
+
+ /*
+ * Now that EFI is in virtual mode, update the function
+ * pointers in the runtime service table to the new virtual addresses.
+ */
+
+ efi.get_time = (efi_get_time_t *) efi.systab->runtime->get_time;
+ efi.set_time = (efi_set_time_t *) efi.systab->runtime->set_time;
+ efi.get_wakeup_time = (efi_get_wakeup_time_t *)
+ efi.systab->runtime->get_wakeup_time;
+ efi.set_wakeup_time = (efi_set_wakeup_time_t *)
+ efi.systab->runtime->set_wakeup_time;
+ efi.get_variable = (efi_get_variable_t *)
+ efi.systab->runtime->get_variable;
+ efi.get_next_variable = (efi_get_next_variable_t *)
+ efi.systab->runtime->get_next_variable;
+ efi.set_variable = (efi_set_variable_t *)
+ efi.systab->runtime->set_variable;
+ efi.get_next_high_mono_count = (efi_get_next_high_mono_count_t *)
+ efi.systab->runtime->get_next_high_mono_count;
+ efi.reset_system = (efi_reset_system_t *)
+ efi.systab->runtime->reset_system;
+}
+
+void __init
+efi_initialize_iomem_resources(struct resource *code_resource,
+ struct resource *data_resource)
+{
+ struct resource *res;
+ efi_memory_desc_t *md;
+ int i;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+
+ if ((md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >
+ 0x100000000ULL)
+ continue;
+ res = alloc_bootmem_low(sizeof(struct resource));
+ switch (md->type) {
+ case EFI_RESERVED_TYPE:
+ res->name = "Reserved Memory";
+ break;
+ case EFI_LOADER_CODE:
+ res->name = "Loader Code";
+ break;
+ case EFI_LOADER_DATA:
+ res->name = "Loader Data";
+ break;
+ case EFI_BOOT_SERVICES_DATA:
+ res->name = "BootServices Data";
+ break;
+ case EFI_BOOT_SERVICES_CODE:
+ res->name = "BootServices Code";
+ break;
+ case EFI_RUNTIME_SERVICES_CODE:
+ res->name = "Runtime Service Code";
+ break;
+ case EFI_RUNTIME_SERVICES_DATA:
+ res->name = "Runtime Service Data";
+ break;
+ case EFI_CONVENTIONAL_MEMORY:
+ res->name = "Conventional Memory";
+ break;
+ case EFI_UNUSABLE_MEMORY:
+ res->name = "Unusable Memory";
+ break;
+ case EFI_ACPI_RECLAIM_MEMORY:
+ res->name = "ACPI Reclaim";
+ break;
+ case EFI_ACPI_MEMORY_NVS:
+ res->name = "ACPI NVS";
+ break;
+ case EFI_MEMORY_MAPPED_IO:
+ res->name = "Memory Mapped IO";
+ break;
+ case EFI_MEMORY_MAPPED_IO_PORT_SPACE:
+ res->name = "Memory Mapped IO Port Space";
+ break;
+ default:
+ res->name = "Reserved";
+ break;
+ }
+ res->start = md->phys_addr;
+ res->end = res->start + ((md->num_pages << EFI_PAGE_SHIFT) - 1);
+ res->flags = IORESOURCE_MEM | IORESOURCE_BUSY;
+ if (request_resource(&iomem_resource, res) < 0)
+ printk(KERN_ERR PFX "Failed to allocate res %s : 0x%lx-0x%lx\n",
+ res->name, res->start, res->end);
+ /*
+ * We don't know which region contains kernel data so we try
+ * it repeatedly and let the resource manager test it.
+ */
+ if (md->type == EFI_CONVENTIONAL_MEMORY) {
+ request_resource(res, code_resource);
+ request_resource(res, data_resource);
+ }
+ }
+}
+
+/*
+ * Convenience functions to obtain memory types and attributes
+ */
+
+u32 efi_mem_type(unsigned long phys_addr)
+{
+ efi_memory_desc_t *md;
+ int i;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+ if ((md->phys_addr <= phys_addr) && (phys_addr <
+ (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
+ return md->type;
+ }
+ return 0;
+}
+
+u64 efi_mem_attributes(unsigned long phys_addr)
+{
+ efi_memory_desc_t *md;
+ int i;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+ if ((md->phys_addr <= phys_addr) && (phys_addr <
+ (md->phys_addr + (md-> num_pages << EFI_PAGE_SHIFT)) ))
+ return md->attribute;
+ }
+ return 0;
+}
+
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/efi_stub.S linux-2.6.0-test6-mm2-efi/arch/i386/kernel/efi_stub.S
--- linux-2.6.0-test6-mm2/arch/i386/kernel/efi_stub.S 1969-12-31 16:00:00.000000000 -0800
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/efi_stub.S 2003-10-03 10:10:40.000000000 -0700
@@ -0,0 +1,125 @@
+/*
+ * EFI call stub for IA32.
+ *
+ * This stub allows us to make EFI calls in physical mode with interrupts
+ * turned off.
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <asm/page.h>
+#include <asm/pgtable.h>
+
+/*
+ * efi_call_phys(void *, ...) is a function with variable parameters.
+ * All the callers of this function assure that all the parameters are 4-bytes.
+ */
+
+/*
+ * In gcc calling convention, EBX, ESP, EBP, ESI and EDI are all callee save.
+ * So we'd better save all of them at the beginning of this function and restore
+ * at the end no matter how many we use, because we can not assure EFI runtime
+ * service functions will comply with gcc calling convention, too.
+ */
+
+.text
+.section .text, "a"
+ENTRY(efi_call_phys)
+ /*
+ * 0. The function can only be called in Linux kernel. So CS has been
+ * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found
+ * the values of these registers are the same. And, the corresponding
+ * GDT entries are identical. So I will do nothing about segment reg
+ * and GDT, but change GDT base register in prelog and epilog.
+ */
+
+ /*
+ * 1. Now I am running with EIP = <physical address> + PAGE_OFFSET.
+ * But to make it smoothly switch from virtual mode to flat mode.
+ * The mapping of lower virtual memory has been created in prelog and
+ * epilog.
+ */
+ movl $1f, %edx
+ subl $__PAGE_OFFSET, %edx
+ jmp *%edx
+1:
+
+ /*
+ * 2. Now on the top of stack is the return
+ * address in the caller of efi_call_phys(), then parameter 1,
+ * parameter 2, ..., param n. To make things easy, we save the return
+ * address of efi_call_phys in a global variable.
+ */
+ popl %edx
+ movl %edx, saved_return_addr
+ /* get the function pointer into ECX*/
+ popl %ecx
+ movl %ecx, efi_rt_function_ptr
+ movl $2f, %edx
+ subl $__PAGE_OFFSET, %edx
+ pushl %edx
+
+ /*
+ * 3. Clear PG bit in %CR0.
+ */
+ movl %cr0, %edx
+ andl $0x7fffffff, %edx
+ movl %edx, %cr0
+ jmp 1f
+1:
+
+ /*
+ * 4. Adjust stack pointer.
+ */
+ subl $__PAGE_OFFSET, %esp
+
+ /*
+ * 5. Call the physical function.
+ */
+ jmp *%ecx
+
+2:
+ /*
+ * 6. After EFI runtime service returns, control will return to
+ * following instruction. We'd better readjust stack pointer first.
+ */
+ addl $__PAGE_OFFSET, %esp
+
+ /*
+ * 7. Restore PG bit
+ */
+ movl %cr0, %edx
+ orl $0x80000000, %edx
+ movl %edx, %cr0
+ jmp 1f
+1:
+ /*
+ * 8. Now restore the virtual mode from flat mode by
+ * adding EIP with PAGE_OFFSET.
+ */
+ movl $1f, %edx
+ jmp *%edx
+1:
+
+ /*
+ * 9. Balance the stack. And because EAX contain the return value,
+ * we'd better not clobber it.
+ */
+ leal efi_rt_function_ptr, %edx
+ movl (%edx), %ecx
+ pushl %ecx
+
+ /*
+ * 10. Push the saved return address onto the stack and return.
+ */
+ leal saved_return_addr, %edx
+ movl (%edx), %ecx
+ pushl %ecx
+ ret
+.previous
+
+.data
+saved_return_addr:
+ .long 0
+efi_rt_function_ptr:
+ .long 0
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/Makefile linux-2.6.0-test6-mm2-efi/arch/i386/kernel/Makefile
--- linux-2.6.0-test6-mm2/arch/i386/kernel/Makefile 2003-10-03 11:50:44.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/Makefile 2003-10-03 10:10:40.000000000 -0700
@@ -7,7 +7,7 @@
obj-y := process.o semaphore.o signal.o entry.o traps.o irq.o vm86.o \
ptrace.o i8259.o ioport.o ldt.o setup.o time.o sys_i386.o \
pci-dma.o i386_ksyms.o i387.o dmi_scan.o bootflag.o \
- doublefault.o entry_trampoline.o
+ doublefault.o efi.o efi_stub.o entry_trampoline.o
obj-y += cpu/
obj-y += timers/
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/reboot.c linux-2.6.0-test6-mm2-efi/arch/i386/kernel/reboot.c
--- linux-2.6.0-test6-mm2/arch/i386/kernel/reboot.c 2003-10-03 11:50:44.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/reboot.c 2003-10-03 10:10:40.000000000 -0700
@@ -7,6 +7,7 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/mc146818rtc.h>
+#include <linux/efi.h>
#include <asm/uaccess.h>
#include <asm/apic.h>
#include "mach_reboot.h"
@@ -261,7 +262,12 @@
disable_IO_APIC();
#endif
- if(!reboot_thru_bios) {
+ if (!reboot_thru_bios) {
+ if (efi_enabled) {
+ efi.reset_system(EFI_RESET_COLD, EFI_SUCCESS, 0, 0);
+ __asm__ __volatile__("lidt %0": :"m" (no_idt));
+ __asm__ __volatile__("int3");
+ }
/* rebooting needs to touch the page at absolute addr 0 */
*((unsigned short *)__va(0x472)) = reboot_mode;
for (;;) {
@@ -271,6 +277,8 @@
__asm__ __volatile__("int3");
}
}
+ if (efi_enabled)
+ efi.reset_system(EFI_RESET_WARM, EFI_SUCCESS, 0, 0);
machine_real_restart(jump_to_bios, sizeof(jump_to_bios));
}
@@ -281,6 +289,8 @@
void machine_power_off(void)
{
+ if (efi_enabled)
+ efi.reset_system(EFI_RESET_SHUTDOWN, EFI_SUCCESS, 0, 0);
if (pm_power_off)
pm_power_off();
}
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/setup.c linux-2.6.0-test6-mm2-efi/arch/i386/kernel/setup.c
--- linux-2.6.0-test6-mm2/arch/i386/kernel/setup.c 2003-10-03 11:50:44.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/setup.c 2003-10-03 11:36:22.000000000 -0700
@@ -36,6 +36,8 @@
#include <linux/root_dev.h>
#include <linux/highmem.h>
#include <linux/module.h>
+#include <linux/efi.h>
+#include <linux/init.h>
#include <video/edid.h>
#include <asm/e820.h>
#include <asm/mpspec.h>
@@ -56,6 +58,8 @@
* Machine setup..
*/
+int efi_enabled = 0;
+
/* cpu data as detected by the assembly code in head.S */
struct cpuinfo_x86 new_cpu_data __initdata = { 0, 0, 0, 0, -1, 1, 0, 0, -1 };
/* common cpu data for all cpus */
@@ -144,6 +148,20 @@
int i;
unsigned long long current_size = 0;
+ if (efi_enabled) {
+ for (i = 0; i < memmap.nr_map; i++) {
+ current_size = memmap.map[i].phys_addr +
+ (memmap.map[i].num_pages << 12);
+ if (memmap.map[i].type == EFI_CONVENTIONAL_MEMORY) {
+ if (current_size > size) {
+ memmap.map[i].num_pages -=
+ (((current_size-size) + PAGE_SIZE-1) >> PAGE_SHIFT);
+ memmap.nr_map = i + 1;
+ return;
+ }
+ }
+ }
+ }
for (i = 0; i < e820.nr_map; i++) {
if (e820.map[i].type == E820_RAM) {
current_size += e820.map[i].size;
@@ -158,17 +176,21 @@
static void __init add_memory_region(unsigned long long start,
unsigned long long size, int type)
{
- int x = e820.nr_map;
+ int x;
+
+ if (!efi_enabled) {
+ x = e820.nr_map;
- if (x == E820MAX) {
- printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
- return;
- }
+ if (x == E820MAX) {
+ printk(KERN_ERR "Ooops! Too many entries in the memory map!\n");
+ return;
+ }
- e820.map[x].addr = start;
- e820.map[x].size = size;
- e820.map[x].type = type;
- e820.nr_map++;
+ e820.map[x].addr = start;
+ e820.map[x].size = size;
+ e820.map[x].type = type;
+ e820.nr_map++;
+ }
} /* add_memory_region */
#define E820_DEBUG 1
@@ -445,7 +467,6 @@
static void __init setup_memory_region(void)
{
char *who = machine_specific_memory_setup();
-
printk(KERN_INFO "BIOS-provided physical RAM map:\n");
print_memory_map(who);
} /* setup_memory_region */
@@ -583,6 +604,23 @@
}
/*
+ * Callback for efi_memory_walk.
+ */
+static int __init
+efi_find_max_pfn(unsigned long start, unsigned long end, void *arg)
+{
+ unsigned long *max_pfn = arg, pfn;
+
+ if (start < end) {
+ pfn = PFN_UP(end -1);
+ if (pfn > *max_pfn)
+ *max_pfn = pfn;
+ }
+ return 0;
+}
+
+
+/*
* Find the highest page frame number we have available
*/
void __init find_max_pfn(void)
@@ -590,6 +628,11 @@
int i;
max_pfn = 0;
+ if (efi_enabled) {
+ efi_memmap_walk(efi_find_max_pfn, &max_pfn);
+ return;
+ }
+
for (i = 0; i < e820.nr_map; i++) {
unsigned long start, end;
/* RAM? */
@@ -664,6 +707,25 @@
}
#ifndef CONFIG_DISCONTIGMEM
+
+/*
+ * Free all available memory for boot time allocation. Used
+ * as a callback function by efi_memory_walk()
+ */
+
+static int __init
+free_available_memory(unsigned long start, unsigned long end, void *arg)
+{
+ /* check max_low_pfn */
+ if (start >= ((max_low_pfn + 1) << PAGE_SHIFT))
+ return 0;
+ if (end >= ((max_low_pfn + 1) << PAGE_SHIFT))
+ end = (max_low_pfn + 1) << PAGE_SHIFT;
+ if (start < end)
+ free_bootmem(start, end - start);
+
+ return 0;
+}
/*
* Register fully available low RAM pages with the bootmem allocator.
*/
@@ -671,6 +733,10 @@
{
int i;
+ if (efi_enabled) {
+ efi_memmap_walk(free_available_memory, NULL);
+ return;
+ }
for (i = 0; i < e820.nr_map; i++) {
unsigned long curr_pfn, last_pfn, size;
/*
@@ -798,11 +864,11 @@
* Request address space for all standard RAM and ROM resources
* and also for regions reported as reserved by the e820.
*/
-static void __init register_memory(unsigned long max_low_pfn)
+static void __init
+legacy_init_iomem_resources(struct resource *code_resource, struct resource *data_resource)
{
- unsigned long low_mem_size;
int i;
-
+
probe_roms();
for (i = 0; i < e820.nr_map; i++) {
struct resource *res;
@@ -825,11 +891,26 @@
* so we try it repeatedly and let the resource manager
* test it.
*/
- request_resource(res, &code_resource);
- request_resource(res, &data_resource);
+ request_resource(res, code_resource);
+ request_resource(res, data_resource);
}
}
+}
+/*
+ * Request address space for all standard resources
+ */
+static void __init register_memory(unsigned long max_low_pfn)
+{
+ unsigned long low_mem_size;
+ int i;
+
+ if (efi_enabled)
+ efi_initialize_iomem_resources(&code_resource, &data_resource);
+ else
+ legacy_init_iomem_resources(&code_resource, &data_resource);
+
+ /* EFI systems may still have VGA */
request_graphics_resource();
/* request I/O space for devices used on all i[345]86 PCs */
@@ -949,6 +1030,13 @@
__setup("noreplacement", noreplacement_setup);
+/*
+ * Determine if we were loaded by an EFI loader. If so, then we have also been
+ * passed the efi memmap, systab, etc., so we should use these data structures
+ * for initialization. Note, the efi init code path is determined by the
+ * global efi_enabled. This allows the same kernel image to be used on existing
+ * systems (with a traditional BIOS) as well as on EFI systems.
+ */
void __init setup_arch(char **cmdline_p)
{
unsigned long max_low_pfn;
@@ -957,6 +1045,12 @@
pre_setup_arch_hook();
early_cpu_init();
+ /* FIXME: This isn't an official loader_type right
+ * now but does currently work with elilo.
+ */
+ if ((LOADER_TYPE == 0x50) && EFI_SYSTAB)
+ efi_enabled = 1;
+
ROOT_DEV = old_decode_dev(ORIG_ROOT_DEV);
drive_info = DRIVE_INFO;
screen_info = SCREEN_INFO;
@@ -979,7 +1073,11 @@
rd_doload = ((RAMDISK_FLAGS & RAMDISK_LOAD_FLAG) != 0);
#endif
ARCH_SETUP
- setup_memory_region();
+ if (efi_enabled)
+ efi_init();
+ else
+ setup_memory_region();
+
copy_edd();
if (!MOUNT_ROOT_RDONLY)
@@ -1013,6 +1111,8 @@
#ifdef CONFIG_X86_GENERICARCH
generic_apic_probe(*cmdline_p);
#endif
+ if (efi_enabled)
+ efi_map_memmap();
/*
* Parse the ACPI tables for possible boot-time SMP configuration.
@@ -1028,7 +1128,8 @@
#ifdef CONFIG_VT
#if defined(CONFIG_VGA_CONSOLE)
- conswitchp = &vga_con;
+ if (!efi_enabled || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
+ conswitchp = &vga_con;
#elif defined(CONFIG_DUMMY_CONSOLE)
conswitchp = &dummy_con;
#endif
diff -urN linux-2.6.0-test6-mm2/arch/i386/kernel/time.c linux-2.6.0-test6-mm2-efi/arch/i386/kernel/time.c
--- linux-2.6.0-test6-mm2/arch/i386/kernel/time.c 2003-09-27 17:50:20.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/kernel/time.c 2003-10-03 10:10:40.000000000 -0700
@@ -44,6 +44,7 @@
#include <linux/module.h>
#include <linux/sysdev.h>
#include <linux/bcd.h>
+#include <linux/efi.h>
#include <asm/io.h>
#include <asm/smp.h>
@@ -160,6 +161,37 @@
return retval;
}
+static int efi_set_rtc_mmss(unsigned long nowtime)
+{
+ int real_seconds, real_minutes;
+ unsigned long flags;
+ efi_status_t status;
+ efi_time_t eft;
+ efi_time_cap_t cap;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+
+ status = efi.get_time(&eft, &cap);
+ if (status != EFI_SUCCESS)
+ panic("Ooops, efitime: can't read time!\n");
+ real_seconds = nowtime % 60;
+ real_minutes = nowtime / 60;
+
+ if (((abs(real_minutes - eft.minute) + 15)/30) & 1)
+ real_minutes += 30;
+ real_minutes %= 60;
+
+ eft.minute = real_minutes;
+ eft.second = real_seconds;
+
+ status = efi.set_time(&eft);
+ if (status != EFI_SUCCESS)
+ panic("Ooops: efitime: can't read time!\n");
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+ return 0;
+}
+
/* last time the cmos clock got updated */
static long last_rtc_update;
@@ -212,7 +244,7 @@
>= USEC_AFTER - ((unsigned) TICK_SIZE) / 2 &&
(xtime.tv_nsec / 1000)
<= USEC_BEFORE + ((unsigned) TICK_SIZE) / 2) {
- if (set_rtc_mmss(xtime.tv_sec) == 0)
+ if ((efi_enabled && (!efi_set_rtc_mmss(xtime.tv_sec) )) || (set_rtc_mmss(xtime.tv_sec) == 0))
last_rtc_update = xtime.tv_sec;
else
last_rtc_update = xtime.tv_sec - 600; /* do it again in 60 s */
@@ -277,6 +309,27 @@
set_kset_name("pit"),
};
+/*
+ * This is called before the RT mappings are in place, so we
+ * need to be able to get the time in physical mode.
+ */
+unsigned long efi_get_time(void)
+{
+ efi_status_t status;
+ unsigned long flags;
+ efi_time_t eft;
+ efi_time_cap_t cap;
+
+ spin_lock_irqsave(&rtc_lock, flags);
+ status = phys_efi_get_time(&eft, &cap);
+ if (status != EFI_SUCCESS)
+ printk("Oops: efitime: can't read time status: 0x%lx\n", status);
+
+ spin_unlock_irqrestore(&rtc_lock, flags);
+
+ return mktime(eft.year, eft.month, eft.day, eft.hour, eft.minute, eft.second);
+}
+
/* XXX this driverfs stuff should probably go elsewhere later -john */
static struct sys_device device_i8253 = {
.id = 0,
@@ -298,7 +351,10 @@
/* Duplicate of time_init() below, with hpet_enable part added */
void __init hpet_time_init(void)
{
- xtime.tv_sec = get_cmos_time();
+ if (efi_enabled)
+ xtime.tv_sec = efi_get_time();
+ else
+ xtime.tv_sec = get_cmos_time();
wall_to_monotonic.tv_sec = -xtime.tv_sec;
xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
wall_to_monotonic.tv_nsec = -xtime.tv_nsec;
@@ -324,8 +380,10 @@
return;
}
#endif
-
- xtime.tv_sec = get_cmos_time();
+ if (efi_enabled)
+ xtime.tv_sec = efi_get_time();
+ else
+ xtime.tv_sec = get_cmos_time();
wall_to_monotonic.tv_sec = -xtime.tv_sec;
xtime.tv_nsec = (INITIAL_JIFFIES % HZ) * (NSEC_PER_SEC / HZ);
wall_to_monotonic.tv_nsec = -xtime.tv_nsec;
diff -urN linux-2.6.0-test6-mm2/arch/i386/mm/init.c linux-2.6.0-test6-mm2-efi/arch/i386/mm/init.c
--- linux-2.6.0-test6-mm2/arch/i386/mm/init.c 2003-10-03 11:50:44.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/arch/i386/mm/init.c 2003-10-03 10:10:40.000000000 -0700
@@ -25,6 +25,7 @@
#include <linux/bootmem.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
+#include <linux/efi.h>
#include <asm/processor.h>
#include <asm/system.h>
@@ -52,12 +53,30 @@
return 0;
}
+extern int is_available_memory(efi_memory_desc_t *);
+
static inline int page_is_ram(unsigned long pagenr)
{
int i;
+ unsigned long addr, end;
+
+ if (efi_enabled) {
+ efi_memory_desc_t *md;
+
+ for (i = 0; i < memmap.nr_map; i++) {
+ md = &memmap.map[i];
+ if (!is_available_memory(md))
+ continue;
+ addr = (md->phys_addr+PAGE_SIZE-1) >> PAGE_SHIFT;
+ end = (md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT)) >> PAGE_SHIFT;
+
+ if ((pagenr >= addr) && (pagenr < end))
+ return 1;
+ }
+ return 0;
+ }
for (i = 0; i < e820.nr_map; i++) {
- unsigned long addr, end;
if (e820.map[i].type != E820_RAM) /* not usable memory */
continue;
diff -urN linux-2.6.0-test6-mm2/drivers/acpi/Kconfig linux-2.6.0-test6-mm2-efi/drivers/acpi/Kconfig
--- linux-2.6.0-test6-mm2/drivers/acpi/Kconfig 2003-10-03 11:50:45.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/drivers/acpi/Kconfig 2003-10-03 11:48:18.000000000 -0700
@@ -252,10 +252,16 @@
dump your ACPI DSDT table using /proc/acpi/dsdt.
config ACPI_EFI
- bool
+ bool "Obtain RSDP from EFI Configuration Table"
depends on ACPI_INTERPRETER
- depends on IA64
- default y
+ depends on IA64 || X86
+ default y
+ help
+ On EFI Systems the RSDP pointer is passed to the kernel via
+ the EFI Configuration Table. On Itanium systems this is
+ standard and required. For IA-32, systems that have
+ EFI firmware should leave this enabled. Platforms with
+ traditional legacy BIOS should disable this option.
config ACPI_RELAXED_AML
bool "Relaxed AML"
diff -urN linux-2.6.0-test6-mm2/drivers/acpi/osl.c linux-2.6.0-test6-mm2-efi/drivers/acpi/osl.c
--- linux-2.6.0-test6-mm2/drivers/acpi/osl.c 2003-09-27 17:50:48.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/drivers/acpi/osl.c 2003-10-03 10:10:40.000000000 -0700
@@ -43,7 +43,6 @@
#ifdef CONFIG_ACPI_EFI
#include <linux/efi.h>
-u64 efi_mem_attributes (u64 phys_addr);
#endif
diff -urN linux-2.6.0-test6-mm2/include/asm-i386/setup.h linux-2.6.0-test6-mm2-efi/include/asm-i386/setup.h
--- linux-2.6.0-test6-mm2/include/asm-i386/setup.h 2003-09-27 17:50:31.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/include/asm-i386/setup.h 2003-10-03 10:10:40.000000000 -0700
@@ -29,6 +29,11 @@
#define IST_INFO (*(struct ist_info *) (PARAM+0x60))
#define DRIVE_INFO (*(struct drive_info_struct *) (PARAM+0x80))
#define SYS_DESC_TABLE (*(struct sys_desc_table_struct*)(PARAM+0xa0))
+#define EFI_SYSTAB ((efi_system_table_t *) *((unsigned long *)(PARAM+0x1c4)))
+#define EFI_MEMDESC_SIZE (*((unsigned long *) (PARAM+0x1c8)))
+#define EFI_MEMDESC_VERSION (*((unsigned long *) (PARAM+0x1cc)))
+#define EFI_MEMMAP ((efi_memory_desc_t *) *((unsigned long *)(PARAM+0x1d0)))
+#define EFI_MEMMAP_SIZE (*((unsigned long *) (PARAM+0x1d4)))
#define MOUNT_ROOT_RDONLY (*(unsigned short *) (PARAM+0x1F2))
#define RAMDISK_FLAGS (*(unsigned short *) (PARAM+0x1F8))
#define VIDEO_MODE (*(unsigned short *) (PARAM+0x1FA))
diff -urN linux-2.6.0-test6-mm2/include/linux/efi.h linux-2.6.0-test6-mm2-efi/include/linux/efi.h
--- linux-2.6.0-test6-mm2/include/linux/efi.h 2003-09-27 17:51:03.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/include/linux/efi.h 2003-10-03 15:41:21.000000000 -0700
@@ -16,6 +16,8 @@
#include <linux/time.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
+#include <linux/rtc.h>
+#include <linux/ioport.h>
#include <asm/page.h>
#include <asm/system.h>
@@ -89,6 +91,11 @@
#define EFI_PAGE_SHIFT 12
+/*
+ * For current x86 implementations of EFI, there is
+ * additional padding in the mem descriptors. This is not
+ * the case in ia64. Need to have this fixed in the f/w.
+ */
typedef struct {
u32 type;
u32 pad;
@@ -96,6 +103,9 @@
u64 virt_addr;
u64 num_pages;
u64 attribute;
+#if defined (__i386__)
+ u64 pad1;
+#endif
} efi_memory_desc_t;
typedef int efi_freemem_callback_t (unsigned long start, unsigned long end, void *arg);
@@ -132,6 +142,7 @@
*/
#define EFI_RESET_COLD 0
#define EFI_RESET_WARM 1
+#define EFI_RESET_SHUTDOWN 2
/*
* EFI Runtime Services table
@@ -169,6 +180,10 @@
typedef efi_status_t efi_get_next_high_mono_count_t (u32 *count);
typedef void efi_reset_system_t (int reset_type, efi_status_t status,
unsigned long data_size, efi_char16_t *data);
+typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_size,
+ unsigned long descriptor_size,
+ u32 descriptor_version,
+ efi_memory_desc_t *virtual_map);
/*
* EFI Configuration Table and GUID definitions
@@ -194,6 +209,9 @@
#define HCDP_TABLE_GUID \
EFI_GUID( 0xf951938d, 0x620b, 0x42ef, 0x82, 0x79, 0xa8, 0x4b, 0x79, 0x61, 0x78, 0x98 )
+#define UGA_IO_PROTOCOL_GUID \
+ EFI_GUID( 0x61a4d49e, 0x6f68, 0x4f1b, 0xb9, 0x22, 0xa8, 0x6e, 0xed, 0xb, 0x7, 0xa2 )
+
typedef struct {
efi_guid_t guid;
unsigned long table;
@@ -218,6 +236,13 @@
unsigned long tables;
} efi_system_table_t;
+struct efi_memory_map {
+ efi_memory_desc_t *phys_map;
+ efi_memory_desc_t *map;
+ int nr_map;
+ unsigned long desc_version;
+};
+
/*
* All runtime access to EFI goes through this structure:
*/
@@ -230,6 +255,7 @@
void *sal_systab; /* SAL system table */
void *boot_info; /* boot info table */
void *hcdp; /* HCDP table */
+ void *uga; /* UGA table */
efi_get_time_t *get_time;
efi_set_time_t *set_time;
efi_get_wakeup_time_t *get_wakeup_time;
@@ -239,6 +265,7 @@
efi_set_variable_t *set_variable;
efi_get_next_high_mono_count_t *get_next_high_mono_count;
efi_reset_system_t *reset_system;
+ efi_set_virtual_address_map_t *set_virtual_address_map;
} efi;
static inline int
@@ -260,12 +287,18 @@
extern void efi_init (void);
extern void efi_map_pal_code (void);
+extern void efi_map_memmap(void);
extern void efi_memmap_walk (efi_freemem_callback_t callback, void *arg);
extern void efi_gettimeofday (struct timespec *ts);
extern void efi_enter_virtual_mode (void); /* switch EFI to virtual mode, if possible */
extern u64 efi_get_iobase (void);
extern u32 efi_mem_type (unsigned long phys_addr);
extern u64 efi_mem_attributes (unsigned long phys_addr);
+extern void efi_initialize_iomem_resources(struct resource *code_resource,
+ struct resource *data_resource);
+extern efi_status_t phys_efi_get_time(efi_time_t *tm, efi_time_cap_t *tc);
+extern struct efi_memory_map memmap;
+extern int efi_enabled;
/*
* Variable Attributes
diff -urN linux-2.6.0-test6-mm2/init/main.c linux-2.6.0-test6-mm2-efi/init/main.c
--- linux-2.6.0-test6-mm2/init/main.c 2003-09-27 17:50:10.000000000 -0700
+++ linux-2.6.0-test6-mm2-efi/init/main.c 2003-10-03 10:10:40.000000000 -0700
@@ -37,6 +37,7 @@
#include <linux/moduleparam.h>
#include <linux/writeback.h>
#include <linux/cpu.h>
+#include <linux/efi.h>
#include <asm/io.h>
#include <asm/bugs.h>
@@ -436,6 +437,8 @@
pidmap_init();
pgtable_cache_init();
pte_chain_init();
+ if (efi_enabled)
+ efi_enter_virtual_mode();
fork_init(num_physpages);
proc_caches_init();
buffer_init();
-
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