summaryrefslogtreecommitdiff
path: root/src/mainboard/emulation
diff options
context:
space:
mode:
authorGerd Hoffmann <kraxel@redhat.com>2013-06-12 10:18:58 +0200
committerGerd Hoffmann <kraxel@redhat.com>2013-11-11 11:56:37 +0100
commit289b45fdffa42db85fa4ad63338677ab8f15e9a2 (patch)
treee59923e1d2526a9685d15d4c01abbce142d41915 /src/mainboard/emulation
parenta91daa5ba15260fc5551ff54fb926d6e2b093711 (diff)
downloadcoreboot-289b45fdffa42db85fa4ad63338677ab8f15e9a2.tar.xz
qemu: add fw_cfg files support
Qemu can provide files using the firmware config interface. This is used to pass config options, virtual machine config info and option roms into the guest. This patch adds support for reading the file index and loading files from qemu. Change-Id: I57d4a734527c4117239f355121cf1fb8a390ab0d Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-on: http://review.coreboot.org/4029 Tested-by: build bot (Jenkins)
Diffstat (limited to 'src/mainboard/emulation')
-rw-r--r--src/mainboard/emulation/qemu-i440fx/fw_cfg.c59
-rw-r--r--src/mainboard/emulation/qemu-i440fx/fw_cfg.h2
2 files changed, 61 insertions, 0 deletions
diff --git a/src/mainboard/emulation/qemu-i440fx/fw_cfg.c b/src/mainboard/emulation/qemu-i440fx/fw_cfg.c
index 5166f83092..b85a163bf8 100644
--- a/src/mainboard/emulation/qemu-i440fx/fw_cfg.c
+++ b/src/mainboard/emulation/qemu-i440fx/fw_cfg.c
@@ -16,6 +16,7 @@
*/
#include <string.h>
+#include <swab.h>
#include <console/console.h>
#include <arch/io.h>
@@ -26,6 +27,7 @@
#define FW_CFG_PORT_DATA 0x0511
static unsigned char fw_cfg_detected = 0xff;
+static FWCfgFiles *fw_files;
static int fw_cfg_present(void)
{
@@ -47,6 +49,63 @@ void fw_cfg_get(int entry, void *dst, int dstlen)
insb(FW_CFG_PORT_DATA, dst, dstlen);
}
+static void fw_cfg_init_file(void)
+{
+ u32 i, size, count = 0;
+
+ if (fw_files != NULL)
+ return;
+
+ fw_cfg_get(FW_CFG_FILE_DIR, &count, sizeof(count));
+ count = swab32(count);
+ size = count * sizeof(FWCfgFile) + sizeof(count);
+ printk(BIOS_DEBUG, "QEMU: %d files in fw_cfg\n", count);
+ fw_files = malloc(size);
+ fw_cfg_get(FW_CFG_FILE_DIR, fw_files, size);
+ fw_files->count = swab32(fw_files->count);
+ for (i = 0; i < count; i++) {
+ fw_files->f[i].size = swab32(fw_files->f[i].size);
+ fw_files->f[i].select = swab16(fw_files->f[i].select);
+ printk(BIOS_DEBUG, "QEMU: %s [size=%d]\n",
+ fw_files->f[i].name, fw_files->f[i].size);
+ }
+}
+
+static FWCfgFile *fw_cfg_find_file(const char *name)
+{
+ int i;
+
+ fw_cfg_init_file();
+ for (i = 0; i < fw_files->count; i++)
+ if (strcmp(fw_files->f[i].name, name) == 0)
+ return fw_files->f + i;
+ return NULL;
+}
+
+int fw_cfg_check_file(const char *name)
+{
+ FWCfgFile *file;
+
+ if (!fw_cfg_present())
+ return -1;
+ file = fw_cfg_find_file(name);
+ if (!file)
+ return -1;
+ return file->size;
+}
+
+void fw_cfg_load_file(const char *name, void *dst)
+{
+ FWCfgFile *file;
+
+ if (!fw_cfg_present())
+ return;
+ file = fw_cfg_find_file(name);
+ if (!file)
+ return;
+ fw_cfg_get(file->select, dst, file->size);
+}
+
int fw_cfg_max_cpus(void)
{
unsigned short max_cpus;
diff --git a/src/mainboard/emulation/qemu-i440fx/fw_cfg.h b/src/mainboard/emulation/qemu-i440fx/fw_cfg.h
index 063e48f838..2a10d8bce9 100644
--- a/src/mainboard/emulation/qemu-i440fx/fw_cfg.h
+++ b/src/mainboard/emulation/qemu-i440fx/fw_cfg.h
@@ -16,4 +16,6 @@
*/
void fw_cfg_get(int entry, void *dst, int dstlen);
+int fw_cfg_check_file(const char *name);
+void fw_cfg_load_file(const char *name, void *dst);
int fw_cfg_max_cpus(void);