diff options
Diffstat (limited to 'cpu/mcf5445x/start.S')
| -rw-r--r-- | cpu/mcf5445x/start.S | 81 |
1 files changed, 52 insertions, 29 deletions
diff --git a/cpu/mcf5445x/start.S b/cpu/mcf5445x/start.S index 26fb2ce..c156bab 100644 --- a/cpu/mcf5445x/start.S +++ b/cpu/mcf5445x/start.S @@ -149,9 +149,35 @@ asm_sbf_img_hdr: .long 0x00030000 /* image length */ .long TEXT_BASE /* image to be relocated at */ + + asm_dram_init: + move.w #0x2700,%sr /* Mask off Interrupt */ + + move.l #CONFIG_SYS_INIT_RAM_ADDR, %d0 + movec %d0, %VBR + move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 - movec %d0, %RAMBAR1 /* init Rambar */ + movec %d0, %RAMBAR1 + + /* initialize general use internal ram */ + move.l #0, %d0 + move.l #(CACR_STATUS), %a1 /* CACR */ + move.l #(ICACHE_STATUS), %a2 /* icache */ + move.l #(DCACHE_STATUS), %a3 /* dcache */ + move.l %d0, (%a1) + move.l %d0, (%a2) + move.l %d0, (%a3) + + /* invalidate and disable cache */ + move.l #0x01004100, %d0 /* Invalidate cache cmd */ + movec %d0, %CACR /* Invalidate cache */ + move.l #0, %d0 + movec %d0, %ACR0 + movec %d0, %ACR1 + movec %d0, %ACR2 + movec %d0, %ACR3 + move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- @@ -163,10 +189,7 @@ asm_dram_init: move.l #0xFC008004, %a1 move.l #(CONFIG_SYS_CS0_MASK), (%a1) - /* - * Dram Initialization - * a1, a2, and d0 - */ + /* Dram Initialization a1, a2, and d0 */ /* mscr sdram */ move.l #0xFC0A4074, %a1 move.b #(CONFIG_SYS_SDRAM_DRV_STRENGTH), (%a1) @@ -209,24 +232,21 @@ dramsz_loop: move.l #0xFC0B8000, %a1 /* Mode */ move.l #0xFC0B8004, %a2 /* Ctrl */ -#ifdef CONFIG_M54455EVB /* Issue PALL */ move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) nop +#ifdef CONFIG_M54455EVB /* Issue LEMR */ move.l #(CONFIG_SYS_SDRAM_EMOD + 0x408), (%a1) nop move.l #(CONFIG_SYS_SDRAM_MODE + 0x300), (%a1) nop - - move.l #1000, %d0 -wait1000: - nop - subq.l #1, %d0 - bne wait1000 #endif + move.l #1000, %d1 + jsr asm_delay + /* Issue PALL */ move.l #(CONFIG_SYS_SDRAM_CTRL + 2), (%a2) nop @@ -246,25 +266,24 @@ wait1000: move.l #(CONFIG_SYS_SDRAM_MODE), (%a1) nop move.l #(CONFIG_SYS_SDRAM_EMOD), (%a1) - nop #endif - move.l #500, %d0 -wait500: - nop - subq.l #1, %d0 - bne wait500 + move.l #500, %d1 + jsr asm_delay - move.l #(CONFIG_SYS_SDRAM_CTRL), %d0 - and.l #0x7FFFFFFF, %d0 + move.l #(CONFIG_SYS_SDRAM_CTRL), %d1 + and.l #0x7FFFFFFF, %d1 #ifdef CONFIG_M54455EVB - or.l #0x10000c00, %d0 + or.l #0x10000C00, %d1 #elif defined(CONFIG_M54451EVB) - or.l #0x10000000, %d0 + or.l #0x10000C00, %d1 #endif - move.l %d0, (%a2) + move.l %d1, (%a2) nop + move.l #2000, %d1 + jsr asm_delay + /* * DSPI Initialization * a0 - general, sram - 0x80008000 - 32, see M54455EVB.h @@ -274,6 +293,7 @@ wait500: * a4 - Dst addr */ /* Enable pins for DSPI mode - chip-selects are enabled later */ +asm_dspi_init: move.l #0xFC0A4063, %a0 move.b #0x7F, (%a0) @@ -367,27 +387,29 @@ asm_dspi_rd_status: move.b (%a3), %d1 rts + +asm_delay: + nop + subq.l #1, %d1 + bne asm_delay + rts #endif /* CONFIG_CF_SBF */ .text . = 0x400 .globl _start _start: +#if !defined(CONFIG_CF_SBF) nop nop move.w #0x2700,%sr /* Mask off Interrupt */ /* Set vector base register at the beginning of the Flash */ -#if defined(CONFIG_CF_SBF) - move.l #TEXT_BASE, %d0 - movec %d0, %VBR -#else move.l #CONFIG_SYS_FLASH_BASE, %d0 movec %d0, %VBR move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_RAM_CTRL), %d0 movec %d0, %RAMBAR1 -#endif /* initialize general use internal ram */ move.l #0, %d0 @@ -411,6 +433,7 @@ _start: the first c-code */ move.l #(CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET), %sp clr.l %sp@- +#endif move.l #__got_start, %a5 /* put relocation table address to a5 */ @@ -532,7 +555,7 @@ icache_enable: move.l #0x00040100, %d0 /* Invalidate icache */ movec %d0, %CACR - move.l #(CONFIG_SYS_SDRAM_BASE + 0x1c000), %d0 /* Setup icache */ + move.l #(CONFIG_SYS_SDRAM_BASE + 0xC000), %d0 /* Setup icache */ movec %d0, %ACR2 move.l #0x04088020, %d0 /* Enable bcache and icache */ |