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Diffstat (limited to 'arch')
-rw-r--r--arch/x86/cpu/qemu/fw_cfg.c63
-rw-r--r--arch/x86/include/asm/fw_cfg.h9
2 files changed, 55 insertions, 17 deletions
diff --git a/arch/x86/cpu/qemu/fw_cfg.c b/arch/x86/cpu/qemu/fw_cfg.c
index 0599214..bcd34af 100644
--- a/arch/x86/cpu/qemu/fw_cfg.c
+++ b/arch/x86/cpu/qemu/fw_cfg.c
@@ -10,10 +10,13 @@
#include <malloc.h>
#include <asm/io.h>
#include <asm/fw_cfg.h>
+#include <linux/list.h>
static bool fwcfg_present;
static bool fwcfg_dma_present;
+static LIST_HEAD(fw_list);
+
/* Read configuration item using fw_cfg PIO interface */
static void qemu_fwcfg_read_entry_pio(uint16_t entry,
uint32_t size, void *address)
@@ -162,29 +165,61 @@ static int qemu_fwcfg_setup_kernel(void *load_addr, void *initrd_addr)
return 0;
}
-static int qemu_fwcfg_list_firmware(void)
+static int qemu_fwcfg_read_firmware_list(void)
{
int i;
uint32_t count;
- struct fw_cfg_files *files;
+ struct fw_file *file;
+ struct list_head *entry;
+
+ /* don't read it twice */
+ if (!list_empty(&fw_list))
+ return 0;
qemu_fwcfg_read_entry(FW_CFG_FILE_DIR, 4, &count);
if (!count)
return 0;
count = be32_to_cpu(count);
- files = malloc(count * sizeof(struct fw_cfg_file));
- if (!files)
- return -ENOMEM;
-
- files->count = count;
- qemu_fwcfg_read_entry(FW_CFG_INVALID,
- count * sizeof(struct fw_cfg_file),
- files->files);
-
- for (i = 0; i < files->count; i++)
- printf("%-56s\n", files->files[i].name);
- free(files);
+ for (i = 0; i < count; i++) {
+ file = malloc(sizeof(*file));
+ if (!file) {
+ printf("error: allocating resource\n");
+ goto err;
+ }
+ qemu_fwcfg_read_entry(FW_CFG_INVALID,
+ sizeof(struct fw_cfg_file), &file->cfg);
+ file->addr = 0;
+ list_add_tail(&file->list, &fw_list);
+ }
+
+ return 0;
+
+err:
+ list_for_each(entry, &fw_list) {
+ file = list_entry(entry, struct fw_file, list);
+ free(file);
+ }
+
+ return -ENOMEM;
+}
+
+static int qemu_fwcfg_list_firmware(void)
+{
+ int ret;
+ struct list_head *entry;
+ struct fw_file *file;
+
+ /* make sure fw_list is loaded */
+ ret = qemu_fwcfg_read_firmware_list();
+ if (ret)
+ return ret;
+
+ list_for_each(entry, &fw_list) {
+ file = list_entry(entry, struct fw_file, list);
+ printf("%-56s\n", file->cfg.name);
+ }
+
return 0;
}
diff --git a/arch/x86/include/asm/fw_cfg.h b/arch/x86/include/asm/fw_cfg.h
index fb110fa..2acf43e 100644
--- a/arch/x86/include/asm/fw_cfg.h
+++ b/arch/x86/include/asm/fw_cfg.h
@@ -12,6 +12,8 @@
#define FW_DMA_PORT_LOW 0x514
#define FW_DMA_PORT_HIGH 0x518
+#include <linux/list.h>
+
enum qemu_fwcfg_items {
FW_CFG_SIGNATURE = 0x00,
FW_CFG_ID = 0x01,
@@ -67,9 +69,10 @@ struct fw_cfg_file {
char name[FW_CFG_MAX_FILE_PATH];
};
-struct fw_cfg_files {
- __be32 count;
- struct fw_cfg_file files[];
+struct fw_file {
+ struct fw_cfg_file cfg; /* firmware file information */
+ unsigned long addr; /* firmware file in-memory address */
+ struct list_head list; /* list node to link to fw_list */
};
struct fw_cfg_dma_access {