malta: use unmapped flash base address

The physical base address of the NOR flash is 0x1e000000
on the Malta boards. The hardware also maps the first 4MiB
of the flash into the 0x1fc00000-0x1fffffff range.

Currently, U-Boot uses the mapped address to access the
flash, which does not work in recent qemu versions.

Since commit a427338b222b43197c2776cbc996936df0302f51
(mips_malta: correct reading MIPS revision at 0x1fc00010)
writing to the mapped address space causes a CPU exception.
Due to the exception, U-Boot hangs during boot when it tries
to detect the CFI flash chip.

Use the correct physical address for the MALTA_FLASH_BASE
constant to fix the problem. In order to avoid relocation
problems, also update the CONFIG_SYS_{TEXT,MONITOR}_BASE
constants.

The change makes it possible to start U-Boot on a Malta
board emulated with Qemu 1.6.1 and 1.7.0-rc0. It also
works on older versions (tested with 1.1.1, 1.2.2, 1.4.2,
1.5.3).

Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Cc: Paul Burton <paul.burton@imgtec.com>

diff --git a/arch/mips/include/asm/malta.h b/arch/mips/include/asm/malta.h
index 9b1100b..bd9043d 100644 (file)
--- a/arch/mips/include/asm/malta.h
+++ b/arch/mips/include/asm/malta.h
@@ -44,7 +44,7 @@
 #define MALTA_RESET_BASE               0x1f000500
 #define GORESET                                0x42
 
-#define MALTA_FLASH_BASE               0x1fc00000
+#define MALTA_FLASH_BASE               0x1e000000
 
 #define MALTA_REVISION                 0x1fc00010
 #define MALTA_REVISION_CORID_SHF       10

diff --git a/include/configs/malta.h b/include/configs/malta.h
index 4098e72..458c33a 100644 (file)
--- a/include/configs/malta.h
+++ b/include/configs/malta.h
@@ -40,8 +40,8 @@
 /*
  * Memory map
  */
-#define CONFIG_SYS_TEXT_BASE           0xbfc00000 /* Rom version */
-#define CONFIG_SYS_MONITOR_BASE                CONFIG_SYS_FLASH_BASE
+#define CONFIG_SYS_TEXT_BASE           0xbe000000 /* Rom version */
+#define CONFIG_SYS_MONITOR_BASE                CONFIG_SYS_TEXT_BASE
 
 #define CONFIG_SYS_SDRAM_BASE          0x80000000 /* Cached addr */
 #define CONFIG_SYS_MEM_SIZE            (256 * 1024 * 1024)