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authorAaron Durbin <adurbin@chromium.org>2015-05-15 13:15:34 -0500
committerAaron Durbin <adurbin@chromium.org>2015-05-26 22:32:47 +0200
commitc6588c5af94e568bddd8111c3fca736f464042cf (patch)
tree0efa16d6948cfde369932fd18dec46102f807c2f /src/mainboard/emulation
parentdef0fb57dfd91e6599c622a7b2769164a5c02ef0 (diff)
downloadcoreboot-c6588c5af94e568bddd8111c3fca736f464042cf.tar.xz
coreboot: introduce boot_device
The boot_device is a region_device that represents the device from which coreboot retrieves and boots its stages. The existing cbfs implementations use the boot_device as the intermediary for accessing the CBFS region. Also, there's currently only support for a read-only view of the boot_device. i.e. one cannot write to the boot_device using this view. However, a writable boot_device could be added in the future. Change-Id: Ic0da796ab161b8025c90631be3423ba6473ad31c Signed-off-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/10216 Tested-by: build bot (Jenkins) Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com> Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/mainboard/emulation')
-rw-r--r--src/mainboard/emulation/qemu-armv7/media.c45
1 files changed, 34 insertions, 11 deletions
diff --git a/src/mainboard/emulation/qemu-armv7/media.c b/src/mainboard/emulation/qemu-armv7/media.c
index 8c71263e67..e0f22515cd 100644
--- a/src/mainboard/emulation/qemu-armv7/media.c
+++ b/src/mainboard/emulation/qemu-armv7/media.c
@@ -12,12 +12,20 @@
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
+#include <boot_device.h>
#include <cbfs.h>
#include <string.h>
#include <symbols.h>
#include <console/console.h>
-/* Simple memory-mapped ROM emulation. */
+/* Maps directly to qemu memory mapped space of 0x10000 up to rom size. */
+static const struct mem_region_device gboot_dev =
+ MEM_REGION_DEV_INIT((void *)0x10000, CONFIG_ROM_SIZE);
+
+const struct region_device *boot_device_ro(void)
+{
+ return &gboot_dev.rdev;
+}
static int emu_rom_open(struct cbfs_media *media)
{
@@ -26,26 +34,40 @@ static int emu_rom_open(struct cbfs_media *media)
static void *emu_rom_map(struct cbfs_media *media, size_t offset, size_t count)
{
- if (offset + count > CONFIG_ROM_SIZE)
- return (void *)-1;
- return (void*)(offset + 0x10000);
+ const struct region_device *boot_dev;
+ void *ptr;
+
+ boot_dev = media->context;
+
+ ptr = rdev_mmap(boot_dev, offset, count);
+
+ if (ptr == NULL)
+ return (void *)-1;
+
+ return ptr;
}
static void *emu_rom_unmap(struct cbfs_media *media, const void *address)
{
+ const struct region_device *boot_dev;
+
+ boot_dev = media->context;
+
+ rdev_munmap(boot_dev, (void *)address);
+
return NULL;
}
static size_t emu_rom_read(struct cbfs_media *media, void *dest, size_t offset,
size_t count)
{
- void *ptr = emu_rom_map(media, offset, count);
+ const struct region_device *boot_dev;
- if (ptr == (void *)-1)
+ boot_dev = media->context;
+
+ if (rdev_readat(boot_dev, dest, offset, count) < 0)
return 0;
- memcpy(dest, ptr, count);
- emu_rom_unmap(media, ptr);
return count;
}
@@ -54,10 +76,11 @@ static int emu_rom_close(struct cbfs_media *media)
return 0;
}
-int init_emu_rom_cbfs_media(struct cbfs_media *media);
-
-int init_emu_rom_cbfs_media(struct cbfs_media *media)
+static int init_emu_rom_cbfs_media(struct cbfs_media *media)
{
+ boot_device_init();
+
+ media->context = (void *)boot_device_ro();
media->open = emu_rom_open;
media->close = emu_rom_close;
media->map = emu_rom_map;