Hello,
The patch attached add support for a flash bank size of 16 MB and for a second
DRAM bank for the KS8695 (ARM9 core) depending on the configuration.
A better solution would be to calculate the values for the registers (only some
shifts are needed) but this was the lazy implementation.
I hope, I don't make to much mistakes in the presentation of my patch because
it is the first patch I publish to this list. Sadly I don't have access to the
development PC any more because it was a project for a subsidiary company and I
finished the project at end of September.
Signed-off-by: Michael Bernstein <michael.bernst...@controlware.de>
---
diff --unified --recursive --new-file
u-boot-2009.11/cpu/arm920t/ks8695/lowlevel_init.S
u-boot-2009.11.new/cpu/arm920t/ks8695/lowlevel_init.S
--- u-boot-2009.11/cpu/arm920t/ks8695/lowlevel_init.S 2009-12-15
23:20:54.000000000 +0100
+++ u-boot-2009.11.new/cpu/arm920t/ks8695/lowlevel_init.S 2010-01-29
11:38:04.000000000 +0100
@@ -96,7 +96,17 @@
str r2, [r1] /* large flash map */
ldr pc, =(highflash+0x02000000-0x00f00000) /* jump to high flash
address */
highflash:
- ldr r2, =0x8fe00040
+#if (PHYS_FLASH_BANK_SIZE == 0x01000000)
+ ldr r2, =0xbfe00071 /* 16MB and start at 32MB */
+ str r2, [r1] /* remap flash range */
+ ldr r1, =(KS8695_IO_BASE+KS8695_MEM_CTRL1)
+ ldr r2, =0xc0300000
+ str r2, [r1] /* flash2 region unused */
+ ldr r1, =(KS8695_IO_BASE+KS8695_MEM_GENERAL)
+ ldr r2, =0x30000003 /* data width 32 */
+ str r2, [r1] /* enable first flash select */
+#else
+ ldr r2, =0x8fe00040 /* 4MB start at 32MB */
str r2, [r1] /* remap flash range */
/*
@@ -111,6 +121,7 @@
ldr r1, =(KS8695_IO_BASE+KS8695_MEM_GENERAL)
ldr r2, =0x30000005
str r2, [r1] /* enable both flash selects */
+#endif
#ifdef CONFIG_CM41xx
/*
@@ -138,7 +149,15 @@
#endif
str r2, [r1] /* configure sdram bank0 setup */
ldr r1, =(KS8695_IO_BASE+KS8695_SDRAM_CTRL1)
- mov r2, #0
+#if (CONFIG_NR_DRAM_BANKS == 2)
+#if (PHYS_SDRAM_2_SIZE == 0x02000000)
+ ldr r2, =0xFFE0000E /* 32MB and start at 32MB */
+#else
+ ldr r2, =0x7FD0000E /* 16MB and start at 16MB */
+#endif
+#else /* CONFIG_NR_DRAM_BANKS == 2 */
+ mov r2, #0 /* no second SDRAM bank */
+#endif /* CONFIG_NR_DRAM_BANKS == 2 */
str r2, [r1] /* configure sdram bank1 setup */
ldr r1, =(KS8695_IO_BASE+KS8695_SDRAM_GENERAL)
--
_________________________________________________
Michael Bernstein
NOC
Controlware GmbH
Waldstrasse 92, 63128 Dietzenbach, GERMANY
Tel.: +49 6074 858-177
Fax: +49 6074 858-148
michael.bernst...@controlware.de
www.controlware.de
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