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-rw-r--r--board/armltd/vexpress64/vexpress64.c101
1 files changed, 96 insertions, 5 deletions
diff --git a/board/armltd/vexpress64/vexpress64.c b/board/armltd/vexpress64/vexpress64.c
index 2ec3bc9..5897318 100644
--- a/board/armltd/vexpress64/vexpress64.c
+++ b/board/armltd/vexpress64/vexpress64.c
@@ -11,6 +11,7 @@
#include <netdev.h>
#include <asm/io.h>
#include <linux/compiler.h>
+#include <asm/semihosting.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -31,11 +32,6 @@ int dram_init(void)
return 0;
}
-int timer_init(void)
-{
- return 0;
-}
-
/*
* Board specific reset that is system reset.
*/
@@ -43,6 +39,101 @@ void reset_cpu(ulong addr)
{
}
+#ifdef CONFIG_BOARD_LATE_INIT
+int board_late_init(void)
+{
+#ifdef CONFIG_SEMIHOSTING
+ /*
+ * Please refer to doc/README.semihosting for a more complete
+ * description.
+ *
+ * We require that the board include file defines these env variables:
+ * - kernel_name
+ * - kernel_addr_r
+ * - initrd_name
+ * - initrd_addr_r
+ * - fdt_name
+ * - fdt_addr_r
+ *
+ * For the "fdt chosen" startup macro, this code will then define:
+ * - initrd_end (based on initrd_addr_r plus actual initrd_size)
+ *
+ * We will then load the kernel, initrd, and fdt into the specified
+ * locations in memory in a similar way that the ATF fastmodel code
+ * uses semihosting calls to load other boot stages and u-boot itself.
+ */
+
+ /* Env variable strings */
+ char *kernel_name = getenv("kernel_name");
+ char *kernel_addr_str = getenv("kernel_addr_r");
+ char *initrd_name = getenv("initrd_name");
+ char *initrd_addr_str = getenv("initrd_addr_r");
+ char *fdt_name = getenv("fdt_name");
+ char *fdt_addr_str = getenv("fdt_addr_r");
+ char initrd_end_str[64];
+
+ /* Actual addresses converted from env variables */
+ void *kernel_addr_r;
+ void *initrd_addr_r;
+ void *fdt_addr_r;
+
+ /* Actual initrd base and size */
+ unsigned long initrd_base;
+ unsigned long initrd_size;
+
+ /* Space available */
+ int avail;
+
+ /* Make sure the environment variables needed are set */
+ if (!(kernel_addr_str && initrd_addr_str && fdt_addr_str)) {
+ printf("%s: Define {kernel/initrd/fdt}_addr_r\n", __func__);
+ return -1;
+ }
+ if (!(kernel_name && initrd_name && fdt_name)) {
+ printf("%s: Define {kernel/initrd/fdt}_name\n", __func__);
+ return -1;
+ }
+
+ /* Get exact initrd_size */
+ initrd_size = smh_len(initrd_name);
+ if (initrd_size == -1) {
+ printf("%s: Can't get file size for \'%s\'\n", __func__,
+ initrd_name);
+ return -1;
+ }
+
+ /* Set initrd_end */
+ initrd_base = simple_strtoul(initrd_addr_str, NULL, 16);
+ initrd_addr_r = (void *)initrd_base;
+ sprintf(initrd_end_str, "0x%lx", initrd_base + initrd_size - 1);
+ setenv("initrd_end", initrd_end_str);
+
+ /* Load kernel to memory */
+ fdt_addr_r = (void *)simple_strtoul(fdt_addr_str, NULL, 16);
+ kernel_addr_r = (void *)simple_strtoul(kernel_addr_str, NULL, 16);
+
+ /*
+ * The kernel must be lower in memory than fdt and loading the
+ * kernel must not trample the fdt or vice versa.
+ */
+ avail = fdt_addr_r - kernel_addr_r;
+ if (avail < 0) {
+ printf("%s: fdt must be after kernel\n", __func__);
+ return -1;
+ }
+ smh_load(kernel_name, kernel_addr_r, avail, 1);
+
+ /* Load fdt to memory */
+ smh_load(fdt_name, fdt_addr_r, 0x20000, 1);
+
+ /* Load initrd to memory */
+ smh_load(initrd_name, initrd_addr_r, initrd_size, 1);
+
+#endif /* CONFIG_SEMIHOSTING */
+ return 0;
+}
+#endif /* CONFIG_BOARD_LATE_INIT */
+
/*
* Board specific ethernet initialization routine.
*/