MIPS: qemu-malta: add reset support

The MIPS Malta board has a SOFTRES register. Writing a
magic value into that register initiates a board reset.

Use this feature to implement reset support.

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Cc: Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>

diff --git a/arch/mips/include/asm/malta.h b/arch/mips/include/asm/malta.h
index b2151649f06c8798120392c942ff9797891337d4..f2bbf0fc255939c56015cca9c75987d8edda7c06 100644 (file)
--- a/arch/mips/include/asm/malta.h
+++ b/arch/mips/include/asm/malta.h
@@ -13,4 +13,7 @@
 
 #define MALTA_UART_BASE                (MALTA_IO_PORT_BASE + 0x3f8)
 
+#define MALTA_RESET_BASE       0x1f000500
+#define GORESET                        0x42
+
 #endif /* _MIPS_ASM_MALTA_H */

diff --git a/board/qemu-malta/qemu-malta.c b/board/qemu-malta/qemu-malta.c
index 9ba711dba3d19cc18fa0b20e284549322e6d6a6a..449da9c85919bf50e5ca15f8ebac24d457f632a9 100644 (file)
--- a/board/qemu-malta/qemu-malta.c
+++ b/board/qemu-malta/qemu-malta.c
@@ -8,6 +8,9 @@
 
 #include <common.h>
 
+#include <asm/io.h>
+#include <asm/malta.h>
+
 phys_size_t initdram(int board_type)
 {
        return CONFIG_SYS_MEM_SIZE;
@@ -18,3 +21,11 @@ int checkboard(void)
        puts("Board: MIPS Malta CoreLV (Qemu)\n");
        return 0;
 }
+
+void _machine_restart(void)
+{
+       void __iomem *reset_base;
+
+       reset_base = (void __iomem *)CKSEG1ADDR(MALTA_RESET_BASE);
+       __raw_writel(GORESET, reset_base);
+}