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authorAlistair Popple <alistair@popple.id.au>2015-03-20 14:59:15 +1100
committerStewart Smith <stewart@linux.vnet.ibm.com>2015-03-26 11:12:18 +1100
commitfc2906d321adf27db33918711b1055a8ea5b34f9 (patch)
tree609849d3bbc735d0643d9cb42fa5e2764ab8da88 /external/memboot
parent822403ea5dcc51a5c70c0ab061ef49adb17d82e4 (diff)
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memboot: Add a memboot flash backend
memboot uses bmc system memory instead of a real flash chip. This patch adds a flash backend for bmc system memory to allow use of the memboot tool (in external/memboot) to boot the system. Signed-off-by: Alistair Popple <alistair@popple.id.au> Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>
Diffstat (limited to 'external/memboot')
-rw-r--r--external/memboot/memboot.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/external/memboot/memboot.c b/external/memboot/memboot.c
index fa42ea9..848c5fe 100644
--- a/external/memboot/memboot.c
+++ b/external/memboot/memboot.c
@@ -33,6 +33,10 @@
#define LPC_HICR6 0x80
#define LPC_HICR7 0x88
#define LPC_HICR8 0x8c
+#define LPC_SCR0SIO 0x170
+
+#define MEMBOOT_SIO_VERSION_FLAG 0x42
+#define MEMBOOT_SIO_FLAG (0x10 << 8)
uint32_t readl(void *addr)
{
@@ -97,6 +101,7 @@ int main(int argc, char *argv[])
{
int mem_fd;
void *lpcreg;
+ uint32_t lpc_scr0sio_val;
uint32_t lpc_hicr7_val = (FLASH_IMG_BASE | 0xe00);
if (argc > 2) {
@@ -117,9 +122,17 @@ int main(int argc, char *argv[])
exit(1);
}
+ lpc_scr0sio_val = readl(lpcreg+LPC_SCR0SIO);
+ lpc_scr0sio_val &= ~0xff;
+ lpc_scr0sio_val |= MEMBOOT_SIO_VERSION_FLAG;
+ lpc_scr0sio_val &= ~MEMBOOT_SIO_FLAG;
+
if (argc == 2) {
boot_firmware_image(mem_fd, argv[1]);
lpc_hicr7_val = (MEM_IMG_BASE | 0xe00);
+
+ /* Set the boot mode scratch register to indicate a memboot */
+ lpc_scr0sio_val |= MEMBOOT_SIO_FLAG;
printf("Booting from memory after power cycle\n");
}
@@ -128,6 +141,10 @@ int main(int argc, char *argv[])
writel(lpc_hicr7_val, lpcreg+LPC_HICR7);
}
+ /* Set the magic value */
+ writel(0x42, lpcreg+LPC_SCR0SIO);
+
+ writel(lpc_scr0sio_val, lpcreg+LPC_SCR0SIO);
printf("LPC_HICR7 = 0x%x\n", lpc_hicr7_val);
return 0;
}