$(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o \
$(obj)/piggy.o
+$(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone
+$(obj)/efi_stub_$(BITS).o: KBUILD_CLFAGS += -fshort-wchar -mno-red-zone
+
ifeq ($(CONFIG_EFI_STUB), y)
VMLINUX_OBJS += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o
endif
nr_gops = size / sizeof(void *);
for (i = 0; i < nr_gops; i++) {
struct efi_graphics_output_mode_info *info;
- efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID;
- void *pciio;
+ efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
+ bool conout_found = false;
+ void *dummy;
void *h = gop_handle[i];
status = efi_call_phys3(sys_table->boottime->handle_protocol,
if (status != EFI_SUCCESS)
continue;
- efi_call_phys3(sys_table->boottime->handle_protocol,
- h, &pciio_proto, &pciio);
+ status = efi_call_phys3(sys_table->boottime->handle_protocol,
+ h, &conout_proto, &dummy);
+
+ if (status == EFI_SUCCESS)
+ conout_found = true;
status = efi_call_phys4(gop->query_mode, gop,
gop->mode->mode, &size, &info);
- if (status == EFI_SUCCESS && (!first_gop || pciio)) {
+ if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
/*
- * Apple provide GOPs that are not backed by
- * real hardware (they're used to handle
- * multiple displays). The workaround is to
- * search for a GOP implementing the PCIIO
- * protocol, and if one isn't found, to just
- * fallback to the first GOP.
+ * Systems that use the UEFI Console Splitter may
+ * provide multiple GOP devices, not all of which are
+ * backed by real hardware. The workaround is to search
+ * for a GOP implementing the ConOut protocol, and if
+ * one isn't found, to just fall back to the first GOP.
*/
width = info->horizontal_resolution;
height = info->vertical_resolution;
pixels_per_scan_line = info->pixels_per_scan_line;
/*
- * Once we've found a GOP supporting PCIIO,
+ * Once we've found a GOP supporting ConOut,
* don't bother looking any further.
*/
- if (pciio)
+ if (conout_found)
break;
first_gop = gop;
si->lfb_width = width;
si->lfb_height = height;
si->lfb_base = fb_base;
- si->lfb_size = fb_size;
si->pages = 1;
if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
si->rsvd_pos = 0;
}
+ si->lfb_size = si->lfb_linelength * si->lfb_height;
+
+ si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
+
free_handle:
efi_call_phys1(sys_table->boottime->free_pool, gop_handle);
return status;
#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
#define EFI_READ_CHUNK_SIZE (1024 * 1024)
+#define EFI_CONSOLE_OUT_DEVICE_GUID \
+ EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x0, 0x90, 0x27, \
+ 0x3f, 0xc1, 0x4d)
+
#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
#define PIXEL_BIT_MASK 2
obj-$(CONFIG_EFI) += efi.o efi_$(BITS).o efi_stub_$(BITS).o
+obj-$(CONFIG_ACPI_BGRT) += efi-bgrt.o
--- /dev/null
+/*
+ * Copyright 2012 Intel Corporation
+ * Author: Josh Triplett <josh@joshtriplett.org>
+ *
+ * Based on the bgrt driver:
+ * Copyright 2012 Red Hat, Inc <mjg@redhat.com>
+ * Author: Matthew Garrett
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/kernel.h>
+#include <linux/acpi.h>
+#include <linux/efi.h>
+#include <linux/efi-bgrt.h>
+
+struct acpi_table_bgrt *bgrt_tab;
+void *bgrt_image;
+size_t bgrt_image_size;
+
+struct bmp_header {
+ u16 id;
+ u32 size;
+} __packed;
+
+void efi_bgrt_init(void)
+{
+ acpi_status status;
+ void __iomem *image;
+ bool ioremapped = false;
+ struct bmp_header bmp_header;
+
+ if (acpi_disabled)
+ return;
+
+ status = acpi_get_table("BGRT", 0,
+ (struct acpi_table_header **)&bgrt_tab);
+ if (ACPI_FAILURE(status))
+ return;
+
+ if (bgrt_tab->version != 1)
+ return;
+ if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address)
+ return;
+
+ image = efi_lookup_mapped_addr(bgrt_tab->image_address);
+ if (!image) {
+ image = ioremap(bgrt_tab->image_address, sizeof(bmp_header));
+ ioremapped = true;
+ if (!image)
+ return;
+ }
+
+ memcpy_fromio(&bmp_header, image, sizeof(bmp_header));
+ if (ioremapped)
+ iounmap(image);
+ bgrt_image_size = bmp_header.size;
+
+ bgrt_image = kmalloc(bgrt_image_size, GFP_KERNEL);
+ if (!bgrt_image)
+ return;
+
+ if (ioremapped) {
+ image = ioremap(bgrt_tab->image_address, bmp_header.size);
+ if (!image) {
+ kfree(bgrt_image);
+ bgrt_image = NULL;
+ return;
+ }
+ }
+
+ memcpy_fromio(bgrt_image, image, bgrt_image_size);
+ if (ioremapped)
+ iounmap(image);
+}
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/efi.h>
+#include <linux/efi-bgrt.h>
#include <linux/export.h>
#include <linux/bootmem.h>
#include <linux/memblock.h>
}
}
-static void __init efi_free_boot_services(void)
+static void __init efi_unmap_memmap(void)
+{
+ if (memmap.map) {
+ early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
+ memmap.map = NULL;
+ }
+}
+
+void __init efi_free_boot_services(void)
{
void *p;
+ if (!efi_native)
+ return;
+
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
efi_memory_desc_t *md = p;
unsigned long long start = md->phys_addr;
free_bootmem_late(start, size);
}
+
+ efi_unmap_memmap();
}
static int __init efi_systab_init(void *phys)
#endif
}
+void __init efi_late_init(void)
+{
+ efi_bgrt_init();
+}
+
void __init efi_set_executable(efi_memory_desc_t *md, bool executable)
{
u64 addr, npages;
}
/*
+ * We can't ioremap data in EFI boot services RAM, because we've already mapped
+ * it as RAM. So, look it up in the existing EFI memory map instead. Only
+ * callable after efi_enter_virtual_mode and before efi_free_boot_services.
+ */
+void __iomem *efi_lookup_mapped_addr(u64 phys_addr)
+{
+ void *p;
+ if (WARN_ON(!memmap.map))
+ return NULL;
+ for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ efi_memory_desc_t *md = p;
+ u64 size = md->num_pages << EFI_PAGE_SHIFT;
+ u64 end = md->phys_addr + size;
+ if (!(md->attribute & EFI_MEMORY_RUNTIME) &&
+ md->type != EFI_BOOT_SERVICES_CODE &&
+ md->type != EFI_BOOT_SERVICES_DATA)
+ continue;
+ if (!md->virt_addr)
+ continue;
+ if (phys_addr >= md->phys_addr && phys_addr < end) {
+ phys_addr += md->virt_addr - md->phys_addr;
+ return (__force void __iomem *)(unsigned long)phys_addr;
+ }
+ }
+ return NULL;
+}
+
+/*
* 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
* non-native EFI
*/
- if (!efi_native)
- goto out;
+ if (!efi_native) {
+ efi_unmap_memmap();
+ return;
+ }
/* Merge contiguous regions of the same type and attribute */
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
}
/*
- * Thankfully, it does seem that no runtime services other than
- * SetVirtualAddressMap() will touch boot services code, so we can
- * get rid of it all at this point
- */
- efi_free_boot_services();
-
- /*
* Now that EFI is in virtual mode, update the function
* pointers in the runtime service table to the new virtual addresses.
*
* Call EFI services through wrapper functions.
*/
+ efi.runtime_version = efi_systab.fw_revision;
efi.get_time = virt_efi_get_time;
efi.set_time = virt_efi_set_time;
efi.get_wakeup_time = virt_efi_get_wakeup_time;
if (__supported_pte_mask & _PAGE_NX)
runtime_code_page_mkexec();
-out:
- early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
- memmap.map = NULL;
kfree(new_memmap);
}
to override that restriction).
config ACPI_BGRT
- tristate "Boottime Graphics Resource Table support"
- default n
+ bool "Boottime Graphics Resource Table support"
+ depends on EFI
help
This driver adds support for exposing the ACPI Boottime Graphics
Resource Table, which allows the operating system to obtain
/*
* Copyright 2012 Red Hat, Inc <mjg@redhat.com>
+ * Copyright 2012 Intel Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
#include <linux/init.h>
#include <linux/device.h>
#include <linux/sysfs.h>
-#include <linux/io.h>
-#include <acpi/acpi.h>
-#include <acpi/acpi_bus.h>
+#include <linux/efi-bgrt.h>
-static struct acpi_table_bgrt *bgrt_tab;
static struct kobject *bgrt_kobj;
-struct bmp_header {
- u16 id;
- u32 size;
-} __attribute ((packed));
-
-static struct bmp_header bmp_header;
-
static ssize_t show_version(struct device *dev,
struct device_attribute *attr, char *buf)
{
static ssize_t show_image(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf, loff_t off, size_t count)
{
- int size = attr->size;
- void __iomem *image = attr->private;
-
- if (off >= size) {
- count = 0;
- } else {
- if (off + count > size)
- count = size - off;
-
- memcpy_fromio(buf, image+off, count);
- }
-
+ memcpy(buf, attr->private + off, count);
return count;
}
static int __init bgrt_init(void)
{
- acpi_status status;
int ret;
- void __iomem *bgrt;
- if (acpi_disabled)
- return -ENODEV;
-
- status = acpi_get_table("BGRT", 0,
- (struct acpi_table_header **)&bgrt_tab);
-
- if (ACPI_FAILURE(status))
+ if (!bgrt_image)
return -ENODEV;
sysfs_bin_attr_init(&image_attr);
-
- bgrt = ioremap(bgrt_tab->image_address, sizeof(struct bmp_header));
-
- if (!bgrt) {
- ret = -EINVAL;
- goto out_err;
- }
-
- memcpy_fromio(&bmp_header, bgrt, sizeof(bmp_header));
- image_attr.size = bmp_header.size;
- iounmap(bgrt);
-
- image_attr.private = ioremap(bgrt_tab->image_address, image_attr.size);
-
- if (!image_attr.private) {
- ret = -EINVAL;
- goto out_err;
- }
-
+ image_attr.private = bgrt_image;
+ image_attr.size = bgrt_image_size;
bgrt_kobj = kobject_create_and_add("bgrt", acpi_kobj);
- if (!bgrt_kobj) {
- ret = -EINVAL;
- goto out_iounmap;
- }
+ if (!bgrt_kobj)
+ return -EINVAL;
ret = sysfs_create_group(bgrt_kobj, &bgrt_attribute_group);
if (ret)
sysfs_remove_group(bgrt_kobj, &bgrt_attribute_group);
out_kobject:
kobject_put(bgrt_kobj);
-out_iounmap:
- iounmap(image_attr.private);
-out_err:
return ret;
}
-static void __exit bgrt_exit(void)
-{
- iounmap(image_attr.private);
- sysfs_remove_group(bgrt_kobj, &bgrt_attribute_group);
- sysfs_remove_bin_file(bgrt_kobj, &image_attr);
-}
-
module_init(bgrt_init);
-module_exit(bgrt_exit);
-MODULE_AUTHOR("Matthew Garrett");
+MODULE_AUTHOR("Matthew Garrett, Josh Triplett <josh@joshtriplett.org>");
MODULE_DESCRIPTION("BGRT boot graphic support");
MODULE_LICENSE("GPL");
int ret;
char *option = NULL;
- dmi_check_system(dmi_system_table);
+ if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
+ !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
+ dmi_check_system(dmi_system_table);
if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
return -ENODEV;
--- /dev/null
+#ifndef _LINUX_EFI_BGRT_H
+#define _LINUX_EFI_BGRT_H
+
+#ifdef CONFIG_ACPI_BGRT
+
+#include <linux/acpi.h>
+
+void efi_bgrt_init(void);
+
+/* The BGRT data itself; only valid if bgrt_image != NULL. */
+extern void *bgrt_image;
+extern size_t bgrt_image_size;
+extern struct acpi_table_bgrt *bgrt_tab;
+
+#else /* !CONFIG_ACPI_BGRT */
+
+static inline void efi_bgrt_init(void) {}
+
+#endif /* !CONFIG_ACPI_BGRT */
+
+#endif /* _LINUX_EFI_BGRT_H */
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 */
+#ifdef CONFIG_X86
+extern void efi_late_init(void);
+extern void efi_free_boot_services(void);
+#else
+static inline void efi_late_init(void) {}
+static inline void efi_free_boot_services(void) {}
+#endif
+extern void __iomem *efi_lookup_mapped_addr(u64 phys_addr);
extern u64 efi_get_iobase (void);
extern u32 efi_mem_type (unsigned long phys_addr);
extern u64 efi_mem_attributes (unsigned long phys_addr);
#define VIDEO_FLAGS_NOCURSOR (1 << 0) /* The video mode has no cursor set */
+#define VIDEO_CAPABILITY_SKIP_QUIRKS (1 << 0)
+
#ifdef __KERNEL__
extern struct screen_info screen_info;
acpi_early_init(); /* before LAPIC and SMP init */
sfi_init_late();
+ if (efi_enabled) {
+ efi_late_init();
+ efi_free_boot_services();
+ }
+
ftrace_init();
/* Do the rest non-__init'ed, we're now alive */
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / commitdiff