Signed-off-by: Graeme Russ graeme.russ@gmail.com --- arch/i386/cpu/sc520/sc520.c | 2 +- arch/i386/cpu/sc520/sc520_asm.S | 49 ++++++++++++++++--------------------- arch/i386/include/asm/ic/sc520.h | 36 ++++++++++++++++++++++----- board/eNET/eNET_start16.S | 7 +++-- 4 files changed, 55 insertions(+), 39 deletions(-)
diff --git a/arch/i386/cpu/sc520/sc520.c b/arch/i386/cpu/sc520/sc520.c index b99408c..7caa4c8 100644 --- a/arch/i386/cpu/sc520/sc520.c +++ b/arch/i386/cpu/sc520/sc520.c @@ -38,7 +38,7 @@ DECLARE_GLOBAL_DATA_PTR; * unsigned long init_sc520_dram(void) */
-volatile sc520_mmcr_t *sc520_mmcr = (sc520_mmcr_t *)0xfffef000; +sc520_mmcr_t *sc520_mmcr = (sc520_mmcr_t *)SC520_MMCR_BASE;
int cpu_init_f(void) { diff --git a/arch/i386/cpu/sc520/sc520_asm.S b/arch/i386/cpu/sc520/sc520_asm.S index 63c14b7..9f6cce3 100644 --- a/arch/i386/cpu/sc520/sc520_asm.S +++ b/arch/i386/cpu/sc520/sc520_asm.S @@ -142,16 +142,9 @@ */
#include <config.h> +#include <asm/ic/sc520.h>
.section .text -.equ DRCCTL, 0x0fffef010 /* DRAM control register */ -.equ DRCTMCTL, 0x0fffef012 /* DRAM timing control register */ -.equ DRCCFG, 0x0fffef014 /* DRAM bank configuration register */ -.equ DRCBENDADR, 0x0fffef018 /* DRAM bank ending address register */ -.equ ECCCTL, 0x0fffef020 /* DRAM ECC control register */ -.equ ECCINT, 0x0fffefd18 /* DRAM ECC nmi-INT mapping */ -.equ DBCTL, 0x0fffef040 /* DRAM buffer control register */ - .equ CACHELINESZ, 0x00000010 /* size of our cache line (read buffer) */ .equ COL11_ADR, 0x0e001e00 /* 11 col addrs */ .equ COL10_ADR, 0x0e000e00 /* 10 col addrs */ @@ -179,27 +172,27 @@ mem_init:
/* initialize dram controller registers */ xorw %ax, %ax - movl $DBCTL, %edi + movl $SC520_DBCTL, %edi movb %al, (%edi) /* disable write buffer */
- movl $ECCCTL, %edi + movl $SC520_ECCCTL, %edi movb %al, (%edi) /* disable ECC */
- movl $DRCTMCTL, %edi + movl $SC520_DRCTMCTL, %edi movb $0x1e, %al /* Set SDRAM timing for slowest */ movb %al, (%edi)
/* setup loop to do 4 external banks starting with bank 3 */ movl $0xff000000, %eax /* enable last bank and setup */ - movl $DRCBENDADR, %edi /* ending address register */ + movl $SC520_DRCBENDADR, %edi /* ending address register */ movl %eax, (%edi)
- movl $DRCCFG, %edi /* setup */ + movl $SC520_DRCCFG, %edi /* setup */ movw $0xbbbb, %ax /* dram config register for */ movw %ax, (%edi)
/* issue a NOP to all DRAMs */ - movl $DRCCTL, %edi /* setup DRAM control register with */ + movl $SC520_DRCCTL, %edi /* setup DRAM control register with */ movb $0x01, %al /* Disable refresh,disable write buffer */ movb %al, (%edi) movl $CACHELINESZ, %esi /* just a dummy address to write for */ @@ -409,7 +402,7 @@ bad_reint: /* * issue all banks precharge */ - movl $DRCCTL, %esi /* setup DRAM control register with */ + movl $SC520_DRCCTL, %esi /* setup DRAM control register with */ movb $0x02, %al /* All banks precharge */ movb %al, (%esi) movl $CACHELINESZ, %esi /* address to init read buffer */ @@ -418,7 +411,7 @@ bad_reint: /* * update ENDING ADDRESS REGISTER */ - movl $DRCBENDADR, %edi /* DRAM ending address register */ + movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ movl %ecx, %ebx addl %ebx, %edi movb %dh, (%edi) @@ -435,7 +428,7 @@ bad_reint: shlw %cl, %bx notw %bx xchgw %cx, %ax - movl $DRCCFG, %edi + movl $SC520_DRCCFG, %edi movw (%edi), %ax andw %bx, %ax orw %dx, %ax @@ -444,7 +437,7 @@ bad_reint:
decw %cx movl %ecx, %ebx - movl $DRCBENDADR, %edi /* DRAM ending address register */ + movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ movb $0xff, %al addl %ebx, %edi movb %al, (%edi) @@ -452,7 +445,7 @@ bad_reint: /* * set control register to NORMAL mode */ - movl $DRCCTL, %esi /* setup DRAM control register with */ + movl $SC520_DRCCTL, %esi /* setup DRAM control register with */ movb $0x00, %al /* Normal mode value */ movb %al, (%esi) movl $CACHELINESZ, %esi /* address to init read buffer */ @@ -460,7 +453,7 @@ bad_reint: jmp nextbank
cleanup: - movl $DRCBENDADR, %edi /* DRAM ending address register */ + movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */ movw $0x04, %cx xorw %ax, %ax cleanuplp: @@ -482,7 +475,7 @@ emptybank:
#if defined CONFIG_SYS_SDRAM_DRCTMCTL /* just have your hardware desinger _GIVE_ you what you need here! */ - movl $DRCTMCTL, %edi + movl $SC520_DRCTMCTL, %edi movb $CONFIG_SYS_SDRAM_DRCTMCTL, %al movb %al, (%edi) #else @@ -491,7 +484,7 @@ emptybank: * Set the CAS latency now since it is hard to do * when we run from the RAM */ - movl $DRCTMCTL, %edi /* DRAM timing register */ + movl $SC520_DRCTMCTL, %edi /* DRAM timing register */ movb (%edi), %al #ifdef CONFIG_SYS_SDRAM_CAS_LATENCY_2T andb $0xef, %al @@ -502,13 +495,13 @@ emptybank: movb %al, (%edi) #endif #endif - movl $DRCCTL, %edi /* DRAM Control register */ + movl $SC520_DRCCTL, %edi /* DRAM Control register */ movb $0x03, %al /* Load mode register cmd */ movb %al, (%edi) movw %ax, (%esi)
- movl $DRCCTL, %edi /* DRAM Control register */ + movl $SC520_DRCCTL, %edi /* DRAM Control register */ movb $0x18, %al /* Enable refresh and NORMAL mode */ movb %al, (%edi)
@@ -553,16 +546,16 @@ set_ecc:
/* enable read, write buffers */ movb $0x11, %al - movl $DBCTL, %edi + movl $SC520_DBCTL, %edi movb %al, (%edi)
/* enable NMI mapping for ECC */ - movl $ECCINT, %edi + movl $SC520_ECCINT, %edi movb $0x10, %al movb %al, (%edi)
/* Turn on ECC */ - movl $ECCCTL, %edi + movl $SC520_ECCCTL, %edi movb $0x05, %al movb %al,(%edi)
@@ -576,7 +569,7 @@ out: */ .globl get_mem_size get_mem_size: - movl $DRCBENDADR, %edi /* DRAM ending address register */ + movl $SC520_DRCBENDADR, %edi /* DRAM ending address register */
bank0: movl (%edi), %eax movl %eax, %ecx diff --git a/arch/i386/include/asm/ic/sc520.h b/arch/i386/include/asm/ic/sc520.h index 053d9c6..5e7fb47 100644 --- a/arch/i386/include/asm/ic/sc520.h +++ b/arch/i386/include/asm/ic/sc520.h @@ -252,16 +252,38 @@ typedef struct sc520_mmcr { u8 pad_0xdc0[0x0240]; } sc520_mmcr_t;
-extern volatile sc520_mmcr_t *sc520_mmcr; +extern sc520_mmcr_t *sc520_mmcr;
#endif
-/* MMCR Offsets (required for assembler code */ -#define SC520_DBCTL 0x0040 /* SDRAM Buffer Control Register */ -#define SC520_PAR14 0x00c0 /* Programmable Address Region 14 Register */ -#define SC520_PAR15 0x00c4 /* Programmable Address Region 15 Register */ -#define SC520_SWTMRMILLI 0x0c60 /* Software Timer Millisecond Count */ -#define SC520_SWTMRMICRO 0x0c62 /* Software Timer Microsecond Count */ +/* Memory Mapped Control Registers (MMCR) Base Address */ +#define SC520_MMCR_BASE 0xfffef000 + +/* MMCR Addresses (required for assembler code) */ +#define SC520_DRCCTL (SC520_MMCR_BASE + 0x010) +#define SC520_DRCTMCTL (SC520_MMCR_BASE + 0x012) +#define SC520_DRCCFG (SC520_MMCR_BASE + 0x014) +#define SC520_DRCBENDADR (SC520_MMCR_BASE + 0x018) +#define SC520_ECCCTL (SC520_MMCR_BASE + 0x020) +#define SC520_DBCTL (SC520_MMCR_BASE + 0x040) +#define SC520_ECCINT (SC520_MMCR_BASE + 0xd18) + +#define SC520_PAR0 (SC520_MMCR_BASE + 0x088) +#define SC520_PAR1 (SC520_PAR0 + (0x04 * 1)) +#define SC520_PAR2 (SC520_PAR0 + (0x04 * 2)) +#define SC520_PAR3 (SC520_PAR0 + (0x04 * 3)) +#define SC520_PAR4 (SC520_PAR0 + (0x04 * 4)) +#define SC520_PAR5 (SC520_PAR0 + (0x04 * 5)) +#define SC520_PAR6 (SC520_PAR0 + (0x04 * 6)) +#define SC520_PAR7 (SC520_PAR0 + (0x04 * 7)) +#define SC520_PAR8 (SC520_PAR0 + (0x04 * 8)) +#define SC520_PAR9 (SC520_PAR0 + (0x04 * 9)) +#define SC520_PAR10 (SC520_PAR0 + (0x04 * 10)) +#define SC520_PAR11 (SC520_PAR0 + (0x04 * 11)) +#define SC520_PAR12 (SC520_PAR0 + (0x04 * 12)) +#define SC520_PAR13 (SC520_PAR0 + (0x04 * 13)) +#define SC520_PAR14 (SC520_PAR0 + (0x04 * 14)) +#define SC520_PAR15 (SC520_PAR0 + (0x04 * 15))
/* MMCR Register bits (not all of them :) ) */
diff --git a/board/eNET/eNET_start16.S b/board/eNET/eNET_start16.S index 06cfd55..183309c 100644 --- a/board/eNET/eNET_start16.S +++ b/board/eNET/eNET_start16.S @@ -30,6 +30,7 @@ /* #include <asm/ic/sc520_defs.h> */
#include "hardware.h" +#include <asm/ic/sc520.h>
.text .section .start16, "ax" @@ -46,17 +47,17 @@ board_init16: movw %ax, %ds
/* Map PAR for Boot Flash (BOOTCS, 512kB @ 0x380000000) */ - movl $0x00c0, %edi /* SC520_PAR14 */ + movl $(SC520_PAR14 - SC520_MMCR_BASE), %edi movl $0x8bfff800, %eax /* TODO: Check this */ movl %eax, (%di)
/* Map PAR for LED, Hex Switches (GPCS6, 20 Bytes @ 0x1000) */ - movl $0x00c4, %edi /* SC520_PAR15 */ + movl $(SC520_PAR15 - SC520_MMCR_BASE), %edi movl $0x38201000, %eax movl %eax, (%di)
/* Disable SDRAM write buffer */ - movw $0x0040, %di /* SC520_DBCTL */ + movw $(SC520_DBCTL - SC520_MMCR_BASE), %di xorw %ax, %ax movb %al, (%di)