* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
* Copyright (C) 2000,2001,2002 Wolfgang Denk <wd@denx.de>
* Copyright (C) 2007 Stefan Roese <sr@denx.de>, DENX Software Engineering
+ * Copyright (c) 2008 Nuovation System Designs, LLC
+ * Grant Erickson <gerickson@nuovations.com>
*
* See file CREDITS for list of people who contributed to this
* project.
#define CONFIG_IDENT_STRING ""
#endif
-#ifdef CFG_INIT_DCACHE_CS
-# if (CFG_INIT_DCACHE_CS == 0)
+#ifdef CONFIG_SYS_INIT_DCACHE_CS
+# if (CONFIG_SYS_INIT_DCACHE_CS == 0)
# define PBxAP pb0ap
# define PBxCR pb0cr
+# if (defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB0AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB0CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 1)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 1)
# define PBxAP pb1ap
# define PBxCR pb1cr
+# if (defined(CONFIG_SYS_EBC_PB1AP) && defined(CONFIG_SYS_EBC_PB1CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB1AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB1CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 2)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 2)
# define PBxAP pb2ap
# define PBxCR pb2cr
+# if (defined(CONFIG_SYS_EBC_PB2AP) && defined(CONFIG_SYS_EBC_PB2CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB2AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB2CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 3)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 3)
# define PBxAP pb3ap
# define PBxCR pb3cr
+# if (defined(CONFIG_SYS_EBC_PB3AP) && defined(CONFIG_SYS_EBC_PB3CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB3AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB3CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 4)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 4)
# define PBxAP pb4ap
# define PBxCR pb4cr
+# if (defined(CONFIG_SYS_EBC_PB4AP) && defined(CONFIG_SYS_EBC_PB4CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB4AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB4CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 5)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 5)
# define PBxAP pb5ap
# define PBxCR pb5cr
+# if (defined(CONFIG_SYS_EBC_PB5AP) && defined(CONFIG_SYS_EBC_PB5CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB5AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB5CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 6)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 6)
# define PBxAP pb6ap
# define PBxCR pb6cr
+# if (defined(CONFIG_SYS_EBC_PB6AP) && defined(CONFIG_SYS_EBC_PB6CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB6AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB6CR
+# endif
# endif
-# if (CFG_INIT_DCACHE_CS == 7)
+# if (CONFIG_SYS_INIT_DCACHE_CS == 7)
# define PBxAP pb7ap
# define PBxCR pb7cr
+# if (defined(CONFIG_SYS_EBC_PB7AP) && defined(CONFIG_SYS_EBC_PB7CR))
+# define PBxAP_VAL CONFIG_SYS_EBC_PB7AP
+# define PBxCR_VAL CONFIG_SYS_EBC_PB7CR
+# endif
# endif
-#endif /* CFG_INIT_DCACHE_CS */
+# ifndef PBxAP_VAL
+# define PBxAP_VAL 0
+# endif
+# ifndef PBxCR_VAL
+# define PBxCR_VAL 0
+# endif
+/*
+ * Memory Bank x (nothingness) initialization CONFIG_SYS_INIT_RAM_ADDR + 64 MiB
+ * used as temporary stack pointer for the primordial stack
+ */
+# ifndef CONFIG_SYS_INIT_DCACHE_PBxAR
+# define CONFIG_SYS_INIT_DCACHE_PBxAR (EBC_BXAP_BME_DISABLED | \
+ EBC_BXAP_TWT_ENCODE(7) | \
+ EBC_BXAP_BCE_DISABLE | \
+ EBC_BXAP_BCT_2TRANS | \
+ EBC_BXAP_CSN_ENCODE(0) | \
+ EBC_BXAP_OEN_ENCODE(0) | \
+ EBC_BXAP_WBN_ENCODE(0) | \
+ EBC_BXAP_WBF_ENCODE(0) | \
+ EBC_BXAP_TH_ENCODE(2) | \
+ EBC_BXAP_RE_DISABLED | \
+ EBC_BXAP_SOR_NONDELAYED | \
+ EBC_BXAP_BEM_WRITEONLY | \
+ EBC_BXAP_PEN_DISABLED)
+# endif /* CONFIG_SYS_INIT_DCACHE_PBxAR */
+# ifndef CONFIG_SYS_INIT_DCACHE_PBxCR
+# define CONFIG_SYS_INIT_DCACHE_PBxCR (EBC_BXCR_BAS_ENCODE(CONFIG_SYS_INIT_RAM_ADDR) | \
+ EBC_BXCR_BS_64MB | \
+ EBC_BXCR_BU_RW | \
+ EBC_BXCR_BW_16BIT)
+# endif /* CONFIG_SYS_INIT_DCACHE_PBxCR */
+# ifndef CONFIG_SYS_INIT_RAM_PATTERN
+# define CONFIG_SYS_INIT_RAM_PATTERN 0xDEADDEAD
+# endif
+#endif /* CONFIG_SYS_INIT_DCACHE_CS */
+
+#if (defined(CONFIG_SYS_INIT_RAM_DCACHE) && (CONFIG_SYS_INIT_RAM_END > (4 << 10)))
+#error Only 4k of init-ram is supported - please adjust CONFIG_SYS_INIT_RAM_END!
+#endif
+
+/*
+ * Unless otherwise overriden, enable two 128MB cachable instruction regions
+ * at CONFIG_SYS_SDRAM_BASE and another 128MB cacheable instruction region covering
+ * NOR flash at CONFIG_SYS_FLASH_BASE. Disable all cacheable data regions.
+ */
+#if !defined(CONFIG_SYS_FLASH_BASE)
+/* If not already defined, set it to the "last" 128MByte region */
+# define CONFIG_SYS_FLASH_BASE 0xf8000000
+#endif
+#if !defined(CONFIG_SYS_ICACHE_SACR_VALUE)
+# define CONFIG_SYS_ICACHE_SACR_VALUE \
+ (PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + ( 0 << 20)) | \
+ PPC_128MB_SACR_VALUE(CONFIG_SYS_SDRAM_BASE + (128 << 20)) | \
+ PPC_128MB_SACR_VALUE(CONFIG_SYS_FLASH_BASE))
+#endif /* !defined(CONFIG_SYS_ICACHE_SACR_VALUE) */
+
+#if !defined(CONFIG_SYS_DCACHE_SACR_VALUE)
+# define CONFIG_SYS_DCACHE_SACR_VALUE \
+ (0x00000000)
+#endif /* !defined(CONFIG_SYS_DCACHE_SACR_VALUE) */
#define function_prolog(func_name) .text; \
.align 2; \
.extern ext_bus_cntlr_init
- .extern sdram_init
#ifdef CONFIG_NAND_U_BOOT
.extern reconfig_tlb0
#endif
/* Continue from 'normal' start */
/*----------------------------------------------------------------*/
2:
-
-#if defined(CONFIG_NAND_SPL)
-#if defined(CONFIG_440EPX) || defined(CONFIG_440GRX)
- /*
- * Enable internal SRAM (only on 440EPx/GRx, 440EP/GR have no OCM)
- */
- lis r2,0x7fff
- ori r2,r2,0xffff
- mfdcr r1,isram0_dpc
- and r1,r1,r2 /* Disable parity check */
- mtdcr isram0_dpc,r1
- mfdcr r1,isram0_pmeg
- and r1,r1,r2 /* Disable pwr mgmt */
- mtdcr isram0_pmeg,r1
-#endif
-#if defined(CONFIG_440EP)
- /*
- * On 440EP with no internal SRAM, we setup SDRAM very early
- * and copy the NAND_SPL to SDRAM and jump to it
- */
- /* Clear Dcache to use as RAM */
- addis r3,r0,CFG_INIT_RAM_ADDR@h
- ori r3,r3,CFG_INIT_RAM_ADDR@l
- addis r4,r0,CFG_INIT_RAM_END@h
- ori r4,r4,CFG_INIT_RAM_END@l
- rlwinm. r5,r4,0,27,31
- rlwinm r5,r4,27,5,31
- beq ..d_ran3
- addi r5,r5,0x0001
-..d_ran3:
- mtctr r5
-..d_ag3:
- dcbz r0,r3
- addi r3,r3,32
- bdnz ..d_ag3
- /*----------------------------------------------------------------*/
- /* Setup the stack in internal SRAM */
- /*----------------------------------------------------------------*/
- lis r1,CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET@l
- li r0,0
- stwu r0,-4(r1)
- stwu r0,-4(r1) /* Terminate call chain */
-
- stwu r1,-8(r1) /* Save back chain and move SP */
- lis r0,RESET_VECTOR@h /* Address of reset vector */
- ori r0,r0, RESET_VECTOR@l
- stwu r1,-8(r1) /* Save back chain and move SP */
- stw r0,+12(r1) /* Save return addr (underflow vect) */
- sync
- bl early_sdram_init
- sync
-#endif /* CONFIG_440EP */
-
- /*
- * Copy SPL from cache into internal SRAM
- */
- li r4,(CFG_NAND_BOOT_SPL_SIZE >> 2) - 1
- mtctr r4
- lis r2,CFG_NAND_BOOT_SPL_SRC@h
- ori r2,r2,CFG_NAND_BOOT_SPL_SRC@l
- lis r3,CFG_NAND_BOOT_SPL_DST@h
- ori r3,r3,CFG_NAND_BOOT_SPL_DST@l
-spl_loop:
- lwzu r4,4(r2)
- stwu r4,4(r3)
- bdnz spl_loop
-
- /*
- * Jump to code in RAM
- */
- bl 00f
-00: mflr r10
- lis r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@h
- ori r3,r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@l
- sub r10,r10,r3
- addi r10,r10,28
- mtlr r10
- blr
-
-start_ram:
- sync
- isync
-#endif /* CONFIG_NAND_SPL */
-
bl 3f
b _start
/*----------------------------------------------------------------*/
/* Debug setup -- some (not very good) ice's need an event*/
- /* to establish control :-( Define CFG_INIT_DBCR to the dbsr */
+ /* to establish control :-( Define CONFIG_SYS_INIT_DBCR to the dbsr */
/* value you need in this case 0x8cff 0000 should do the trick */
/*----------------------------------------------------------------*/
-#if defined(CFG_INIT_DBCR)
+#if defined(CONFIG_SYS_INIT_DBCR)
lis r1,0xffff
ori r1,r1,0xffff
mtspr dbsr,r1 /* Clear all status bits */
- lis r0,CFG_INIT_DBCR@h
- ori r0,r0,CFG_INIT_DBCR@l
+ lis r0,CONFIG_SYS_INIT_DBCR@h
+ ori r0,r0,CONFIG_SYS_INIT_DBCR@l
mtspr dbcr0,r0
isync
#endif
/*----------------------------------------------------------------*/
li r0,0
-#ifdef CFG_INIT_RAM_DCACHE
+#ifdef CONFIG_SYS_INIT_RAM_DCACHE
/* Clear Dcache to use as RAM */
- addis r3,r0,CFG_INIT_RAM_ADDR@h
- ori r3,r3,CFG_INIT_RAM_ADDR@l
- addis r4,r0,CFG_INIT_RAM_END@h
- ori r4,r4,CFG_INIT_RAM_END@l
+ addis r3,r0,CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
+ addis r4,r0,CONFIG_SYS_INIT_RAM_END@h
+ ori r4,r4,CONFIG_SYS_INIT_RAM_END@l
rlwinm. r5,r4,0,27,31
rlwinm r5,r4,27,5,31
beq ..d_ran
dcbz r0,r3
addi r3,r3,32
bdnz ..d_ag
-#endif /* CFG_INIT_RAM_DCACHE */
+
+ /*
+ * Lock the init-ram/stack in d-cache, so that other regions
+ * may use d-cache as well
+ * Note, that this current implementation locks exactly 4k
+ * of d-cache, so please make sure that you don't define a
+ * bigger init-ram area. Take a look at the lwmon5 440EPx
+ * implementation as a reference.
+ */
+ msync
+ isync
+ /* 8. set TFLOOR/NFLOOR to 8 (-> 8*16*32 bytes locked -> 4k) */
+ lis r1,0x0201
+ ori r1,r1,0xf808
+ mtspr dvlim,r1
+ lis r1,0x0808
+ ori r1,r1,0x0808
+ mtspr dnv0,r1
+ mtspr dnv1,r1
+ mtspr dnv2,r1
+ mtspr dnv3,r1
+ mtspr dtv0,r1
+ mtspr dtv1,r1
+ mtspr dtv2,r1
+ mtspr dtv3,r1
+ msync
+ isync
+#endif /* CONFIG_SYS_INIT_RAM_DCACHE */
/* 440EP & 440GR are only 440er PPC's without internal SRAM */
#if !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
/* not all PPC's have internal SRAM usable as L2-cache */
-#if defined(CONFIG_440GX) || defined(CONFIG_440SP) || defined(CONFIG_440SPE)
+#if defined(CONFIG_440GX) || \
+ defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+ defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+ defined(CONFIG_460SX)
mtdcr l2_cache_cfg,r0 /* Ensure L2 Cache is off */
#endif
lis r1, 0x0003
ori r1,r1, 0x0984 /* fourth 64k */
mtdcr isram0_sb3cr,r1
+#elif defined(CONFIG_460EX) || defined(CONFIG_460GT)
+ lis r1,0x4000 /* BAS = 8000_0000 */
+ ori r1,r1,0x4580 /* 16k */
+ mtdcr isram0_sb0cr,r1
+#elif defined(CONFIG_460SX)
+ lis r1,0x0000 /* BAS = 0000_0000 */
+ ori r1,r1,0x0B84 /* first 128k */
+ mtdcr isram0_sb0cr,r1
+ lis r1,0x0001
+ ori r1,r1,0x0B84 /* second 128k */
+ mtdcr isram0_sb1cr,r1
+ lis r1, 0x0002
+ ori r1,r1, 0x0B84 /* third 128k */
+ mtdcr isram0_sb2cr,r1
+ lis r1, 0x0003
+ ori r1,r1, 0x0B84 /* fourth 128k */
+ mtdcr isram0_sb3cr,r1
#elif defined(CONFIG_440GP)
ori r1,r1,0x0380 /* 8k rw */
mtdcr isram0_sb0cr,r1
/*----------------------------------------------------------------*/
/* Setup the stack in internal SRAM */
/*----------------------------------------------------------------*/
- lis r1,CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET@l
+ lis r1,CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET@l
li r0,0
stwu r0,-4(r1)
stwu r0,-4(r1) /* Terminate call chain */
stw r0,+12(r1) /* Save return addr (underflow vect) */
#ifdef CONFIG_NAND_SPL
- bl nand_boot /* will not return */
+ bl nand_boot_common /* will not return */
#else
GET_GOT
/* make sure above stores all comlete before going on */
sync
- /*----------------------------------------------------------------------- */
- /* Enable two 128MB cachable regions. */
- /*----------------------------------------------------------------------- */
- addis r1,r0,0xc000
- addi r1,r1,0x0001
- mticcr r1 /* instruction cache */
+ /* Set-up icache cacheability. */
+ lis r1, CONFIG_SYS_ICACHE_SACR_VALUE@h
+ ori r1, r1, CONFIG_SYS_ICACHE_SACR_VALUE@l
+ mticcr r1
+ isync
- addis r1,r0,0x0000
- addi r1,r1,0x0000
- mtdccr r1 /* data cache */
+ /* Set-up dcache cacheability. */
+ lis r1, CONFIG_SYS_DCACHE_SACR_VALUE@h
+ ori r1, r1, CONFIG_SYS_DCACHE_SACR_VALUE@l
+ mtdccr r1
- addis r1,r0,CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET /* set up the stack to SDRAM */
+ addis r1,r0,CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack to SDRAM */
li r0, 0 /* Make room for stack frame header and */
stwu r0, -4(r1) /* clear final stack frame so that */
stwu r0, -4(r1) /* stack backtraces terminate cleanly */
/* dbsr is cleared by setting bits to 1) */
mtdbsr r4 /* clear/reset the dbsr */
- /*----------------------------------------------------------------------- */
- /* Invalidate I and D caches. Enable I cache for defined memory regions */
- /* to speed things up. Leave the D cache disabled for now. It will be */
- /* enabled/left disabled later based on user selected menu options. */
- /* Be aware that the I cache may be disabled later based on the menu */
- /* options as well. See miscLib/main.c. */
- /*----------------------------------------------------------------------- */
+ /* Invalidate the i- and d-caches. */
bl invalidate_icache
bl invalidate_dcache
- /*----------------------------------------------------------------------- */
- /* Enable two 128MB cachable regions. */
- /*----------------------------------------------------------------------- */
- lis r4,0xc000
- ori r4,r4,0x0001
- mticcr r4 /* instruction cache */
+ /* Set-up icache cacheability. */
+ lis r4, CONFIG_SYS_ICACHE_SACR_VALUE@h
+ ori r4, r4, CONFIG_SYS_ICACHE_SACR_VALUE@l
+ mticcr r4
isync
- lis r4,0x0000
- ori r4,r4,0x0000
- mtdccr r4 /* data cache */
+ /* Set-up dcache cacheability. */
+ lis r4, CONFIG_SYS_DCACHE_SACR_VALUE@h
+ ori r4, r4, CONFIG_SYS_DCACHE_SACR_VALUE@l
+ mtdccr r4
-#if !(defined(CFG_EBC_PB0AP) && defined(CFG_EBC_PB0CR)) || defined(CONFIG_405EX)
+#if !(defined(CONFIG_SYS_EBC_PB0AP) && defined(CONFIG_SYS_EBC_PB0CR))\
+ && !defined (CONFIG_XILINX_405)
/*----------------------------------------------------------------------- */
/* Tune the speed and size for flash CS0 */
/*----------------------------------------------------------------------- */
bl ext_bus_cntlr_init
#endif
-#if !(defined(CFG_INIT_DCACHE_CS) || defined(CFG_TEMP_STACK_OCM))
+
+#if !(defined(CONFIG_SYS_INIT_DCACHE_CS) || defined(CONFIG_SYS_TEMP_STACK_OCM))
/*
- * Boards like the Kilauea (405EX) don't have OCM and can't use
- * DCache for init-ram. So setup stack here directly after the
- * SDRAM is initialized.
+ * For boards that don't have OCM and can't use the data cache
+ * for their primordial stack, setup stack here directly after the
+ * SDRAM is initialized in ext_bus_cntlr_init.
*/
- lis r1, CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET /* set up the stack in SDRAM */
+ lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r1,r1,CONFIG_SYS_INIT_SP_OFFSET /* set up the stack in SDRAM */
li r0, 0 /* Make room for stack frame header and */
stwu r0, -4(r1) /* clear final stack frame so that */
ori r0, r0, RESET_VECTOR@l
stwu r1, -8(r1) /* Save back chain and move SP */
stw r0, +12(r1) /* Save return addr (underflow vect) */
-#endif /* !(CFG_INIT_DCACHE_CS || !CFG_TEM_STACK_OCM) */
+#endif /* !(CONFIG_SYS_INIT_DCACHE_CS || !CONFIG_SYS_TEM_STACK_OCM) */
#if defined(CONFIG_405EP)
/*----------------------------------------------------------------------- */
/* DMA Status, clear to come up clean */
/*----------------------------------------------------------------------- */
- addis r3,r0, 0xFFFF /* Clear all existing DMA status */
+ addis r3,r0, 0xFFFF /* Clear all existing DMA status */
ori r3,r3, 0xFFFF
mtdcr dmasr, r3
- bl ppc405ep_init /* do ppc405ep specific init */
+ bl ppc405ep_init /* do ppc405ep specific init */
#endif /* CONFIG_405EP */
-#if defined(CFG_OCM_DATA_ADDR) && defined(CFG_OCM_DATA_SIZE)
+#if defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE)
#if defined(CONFIG_405EZ)
/********************************************************************
* Setup OCM - On Chip Memory - PPC405EZ uses OCM Controller V2
*******************************************************************/
/*
* We can map the OCM on the PLB3, so map it at
- * CFG_OCM_DATA_ADDR + 0x8000
+ * CONFIG_SYS_OCM_DATA_ADDR + 0x8000
*/
- lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */
- ori r3,r3,CFG_OCM_DATA_ADDR@l
+ lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
+ ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
mtdcr ocmplb3cr1,r3 /* Set PLB Access */
ori r3,r3,0x4000 /* Add 0x4000 for bank 2 */
mtdcr ocmplb3cr2,r3 /* Set PLB Access */
isync
- lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */
- ori r3,r3,CFG_OCM_DATA_ADDR@l
+ lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
+ ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
ori r3,r3,0x0270 /* 16K for Bank 1, R/W/Enable */
mtdcr ocmdscr1, r3 /* Set Data Side */
mtdcr ocmiscr1, r3 /* Set Instruction Side */
mtdcr ocmdscntl, r4 /* set data-side IRAM config */
isync
- lis r3,CFG_OCM_DATA_ADDR@h /* OCM location */
- ori r3,r3,CFG_OCM_DATA_ADDR@l
+ lis r3,CONFIG_SYS_OCM_DATA_ADDR@h /* OCM location */
+ ori r3,r3,CONFIG_SYS_OCM_DATA_ADDR@l
mtdcr ocmdsarc, r3
addis r4, 0, 0xC000 /* OCM data area enabled */
mtdcr ocmdscntl, r4
#endif /* CONFIG_405EZ */
#endif
-#ifdef CONFIG_NAND_SPL
+ /*----------------------------------------------------------------------- */
+ /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
+ /*----------------------------------------------------------------------- */
+#ifdef CONFIG_SYS_INIT_DCACHE_CS
+ li r4, PBxAP
+ mtdcr ebccfga, r4
+ lis r4, CONFIG_SYS_INIT_DCACHE_PBxAR@h
+ ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxAR@l
+ mtdcr ebccfgd, r4
+
+ addi r4, 0, PBxCR
+ mtdcr ebccfga, r4
+ lis r4, CONFIG_SYS_INIT_DCACHE_PBxCR@h
+ ori r4, r4, CONFIG_SYS_INIT_DCACHE_PBxCR@l
+ mtdcr ebccfgd, r4
+
/*
- * Copy SPL from cache into internal SRAM
+ * Enable the data cache for the 128MB storage access control region
+ * at CONFIG_SYS_INIT_RAM_ADDR.
*/
- li r4,(CFG_NAND_BOOT_SPL_SIZE >> 2) - 1
- mtctr r4
- lis r2,CFG_NAND_BOOT_SPL_SRC@h
- ori r2,r2,CFG_NAND_BOOT_SPL_SRC@l
- lis r3,CFG_NAND_BOOT_SPL_DST@h
- ori r3,r3,CFG_NAND_BOOT_SPL_DST@l
-spl_loop:
- lwzu r4,4(r2)
- stwu r4,4(r3)
- bdnz spl_loop
+ mfdccr r4
+ oris r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
+ ori r4, r4, PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
+ mtdccr r4
/*
- * Jump to code in RAM
+ * Preallocate data cache lines to be used to avoid a subsequent
+ * cache miss and an ensuing machine check exception when exceptions
+ * are enabled.
*/
- bl 00f
-00: mflr r10
- lis r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@h
- ori r3,r3,(CFG_NAND_BOOT_SPL_SRC - CFG_NAND_BOOT_SPL_DST)@l
- sub r10,r10,r3
- addi r10,r10,28
- mtlr r10
- blr
+ li r0, 0
-start_ram:
- sync
- isync
-#endif /* CONFIG_NAND_SPL */
+ lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
- /*----------------------------------------------------------------------- */
- /* Setup temporary stack in DCACHE or OCM if needed for SDRAM SPD. */
- /*----------------------------------------------------------------------- */
-#ifdef CFG_INIT_DCACHE_CS
- /*----------------------------------------------------------------------- */
- /* Memory Bank x (nothingness) initialization 1GB+64MEG */
- /* used as temporary stack pointer for stage0 */
- /*----------------------------------------------------------------------- */
- li r4,PBxAP
- mtdcr ebccfga,r4
- lis r4,0x0380
- ori r4,r4,0x0480
- mtdcr ebccfgd,r4
-
- addi r4,0,PBxCR
- mtdcr ebccfga,r4
- lis r4,0x400D
- ori r4,r4,0xa000
- mtdcr ebccfgd,r4
-
- /* turn on data cache for this region */
- lis r4,0x0080
- mtdccr r4
+ lis r4, CONFIG_SYS_INIT_RAM_END@h
+ ori r4, r4, CONFIG_SYS_INIT_RAM_END@l
+
+ /*
+ * Convert the size, in bytes, to the number of cache lines/blocks
+ * to preallocate.
+ */
+ clrlwi. r5, r4, (32 - L1_CACHE_SHIFT)
+ srwi r5, r4, L1_CACHE_SHIFT
+ beq ..load_counter
+ addi r5, r5, 0x0001
+..load_counter:
+ mtctr r5
- /* set stack pointer and clear stack to known value */
+ /* Preallocate the computed number of cache blocks. */
+..alloc_dcache_block:
+ dcba r0, r3
+ addi r3, r3, L1_CACHE_BYTES
+ bdnz ..alloc_dcache_block
+ sync
- lis r1,CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET@l
+ /*
+ * Load the initial stack pointer and data area and convert the size,
+ * in bytes, to the number of words to initialize to a known value.
+ */
+ lis r1, CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r1, r1, CONFIG_SYS_INIT_SP_OFFSET@l
- li r4,2048 /* we store 2048 words to stack */
+ lis r4, (CONFIG_SYS_INIT_RAM_END >> 2)@h
+ ori r4, r4, (CONFIG_SYS_INIT_RAM_END >> 2)@l
mtctr r4
- lis r2,CFG_INIT_RAM_ADDR@h /* we also clear data area */
- ori r2,r2,CFG_INIT_RAM_END@l /* so cant copy value from r1 */
+ lis r2, CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r2, r2, CONFIG_SYS_INIT_RAM_END@l
- lis r4,0xdead /* we store 0xdeaddead in the stack */
- ori r4,r4,0xdead
+ lis r4, CONFIG_SYS_INIT_RAM_PATTERN@h
+ ori r4, r4, CONFIG_SYS_INIT_RAM_PATTERN@l
..stackloop:
- stwu r4,-4(r2)
+ stwu r4, -4(r2)
bdnz ..stackloop
- li r0, 0 /* Make room for stack frame header and */
- stwu r0, -4(r1) /* clear final stack frame so that */
- stwu r0, -4(r1) /* stack backtraces terminate cleanly */
+ /*
+ * Make room for stack frame header and clear final stack frame so
+ * that stack backtraces terminate cleanly.
+ */
+ stwu r0, -4(r1)
+ stwu r0, -4(r1)
+
/*
* Set up a dummy frame to store reset vector as return address.
* this causes stack underflow to reset board.
stwu r1, -8(r1) /* Save back chain and move SP */
stw r0, +12(r1) /* Save return addr (underflow vect) */
-#elif defined(CFG_TEMP_STACK_OCM) && \
- (defined(CFG_OCM_DATA_ADDR) && defined(CFG_OCM_DATA_SIZE))
+#elif defined(CONFIG_SYS_TEMP_STACK_OCM) && \
+ (defined(CONFIG_SYS_OCM_DATA_ADDR) && defined(CONFIG_SYS_OCM_DATA_SIZE))
/*
* Stack in OCM.
*/
/* Set up Stack at top of OCM */
- lis r1, (CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET)@h
- ori r1, r1, (CFG_INIT_RAM_ADDR + CFG_INIT_SP_OFFSET)@l
+ lis r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@h
+ ori r1, r1, (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_INIT_SP_OFFSET)@l
/* Set up a zeroized stack frame so that backtrace works right */
li r0, 0
ori r0, r0, RESET_VECTOR@l
stwu r1, -8(r1) /* Save back chain and move SP */
stw r0, +12(r1) /* Save return addr (underflow vect) */
-#endif /* CFG_INIT_DCACHE_CS */
-
- /*----------------------------------------------------------------------- */
- /* Initialize SDRAM Controller */
- /*----------------------------------------------------------------------- */
- bl sdram_init
+#endif /* CONFIG_SYS_INIT_DCACHE_CS */
#ifdef CONFIG_NAND_SPL
- bl nand_boot /* will not return */
+ bl nand_boot_common /* will not return */
#else
GET_GOT /* initialize GOT access */
lwbrx r3,r0,r3
blr
-/*------------------------------------------------------------------------------- */
-/* Function: ppcDcbf */
-/* Description: Data Cache block flush */
-/* Input: r3 = effective address */
-/* Output: none. */
-/*------------------------------------------------------------------------------- */
- .globl ppcDcbf
-ppcDcbf:
- dcbf r0,r3
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: ppcDcbi */
-/* Description: Data Cache block Invalidate */
-/* Input: r3 = effective address */
-/* Output: none. */
-/*------------------------------------------------------------------------------- */
- .globl ppcDcbi
-ppcDcbi:
- dcbi r0,r3
- blr
-
-/*------------------------------------------------------------------------------- */
-/* Function: ppcSync */
-/* Description: Processor Synchronize */
-/* Input: none. */
-/* Output: none. */
-/*------------------------------------------------------------------------------- */
- .globl ppcSync
-ppcSync:
- sync
- blr
-
/*
* void relocate_code (addr_sp, gd, addr_moni)
*
* This "function" does not return, instead it continues in RAM
* after relocating the monitor code.
*
- * r3 = dest
- * r4 = src
- * r5 = length in bytes
- * r6 = cachelinesize
+ * r3 = Relocated stack pointer
+ * r4 = Relocated global data pointer
+ * r5 = Relocated text pointer
*/
.globl relocate_code
relocate_code:
-#ifdef CONFIG_4xx_DCACHE
+#if defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS)
/*
- * We need to flush the Init Data before the dcache will be
- * invalidated
+ * We need to flush the initial global data (gd_t) before the dcache
+ * will be invalidated.
*/
- /* save regs */
- mr r9,r3
- mr r10,r4
- mr r11,r5
+ /* Save registers */
+ mr r9, r3
+ mr r10, r4
+ mr r11, r5
- mr r3,r4
- addi r4,r4,0x200 /* should be enough for init data */
+ /* Flush initial global data range */
+ mr r3, r4
+ addi r4, r4, CONFIG_SYS_GBL_DATA_SIZE@l
bl flush_dcache_range
- /* restore regs */
- mr r3,r9
- mr r4,r10
- mr r5,r11
-#endif
+#if defined(CONFIG_SYS_INIT_DCACHE_CS)
+ /*
+ * Undo the earlier data cache set-up for the primordial stack and
+ * data area. First, invalidate the data cache and then disable data
+ * cacheability for that area. Finally, restore the EBC values, if
+ * any.
+ */
+
+ /* Invalidate the primordial stack and data area in cache */
+ lis r3, CONFIG_SYS_INIT_RAM_ADDR@h
+ ori r3, r3, CONFIG_SYS_INIT_RAM_ADDR@l
+
+ lis r4, CONFIG_SYS_INIT_RAM_END@h
+ ori r4, r4, CONFIG_SYS_INIT_RAM_END@l
+ add r4, r4, r3
+
+ bl invalidate_dcache_range
+
+ /* Disable cacheability for the region */
+ mfdccr r3
+ lis r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@h
+ ori r4, r4, ~PPC_128MB_SACR_VALUE(CONFIG_SYS_INIT_RAM_ADDR)@l
+ and r3, r3, r4
+ mtdccr r3
+
+ /* Restore the EBC parameters */
+ li r3, PBxAP
+ mtdcr ebccfga, r3
+ lis r3, PBxAP_VAL@h
+ ori r3, r3, PBxAP_VAL@l
+ mtdcr ebccfgd, r3
+
+ li r3, PBxCR
+ mtdcr ebccfga, r3
+ lis r3, PBxCR_VAL@h
+ ori r3, r3, PBxCR_VAL@l
+ mtdcr ebccfgd, r3
+#endif /* defined(CONFIG_SYS_INIT_DCACHE_CS) */
+
+ /* Restore registers */
+ mr r3, r9
+ mr r4, r10
+ mr r5, r11
+#endif /* defined(CONFIG_4xx_DCACHE) || defined(CONFIG_SYS_INIT_DCACHE_CS) */
+
+#ifdef CONFIG_SYS_INIT_RAM_DCACHE
+ /*
+ * Unlock the previously locked d-cache
+ */
+ msync
+ isync
+ /* set TFLOOR/NFLOOR to 0 again */
+ lis r6,0x0001
+ ori r6,r6,0xf800
+ mtspr dvlim,r6
+ lis r6,0x0000
+ ori r6,r6,0x0000
+ mtspr dnv0,r6
+ mtspr dnv1,r6
+ mtspr dnv2,r6
+ mtspr dnv3,r6
+ mtspr dtv0,r6
+ mtspr dtv1,r6
+ mtspr dtv2,r6
+ mtspr dtv3,r6
+ msync
+ isync
+#endif /* CONFIG_SYS_INIT_RAM_DCACHE */
+
#if defined(CONFIG_440EP) || defined(CONFIG_440GR) || \
defined(CONFIG_440EPX) || defined(CONFIG_440GRX) || \
- defined(CONFIG_440SP) || defined(CONFIG_440SPE)
+ defined(CONFIG_440SP) || defined(CONFIG_440SPE) || \
+ defined(CONFIG_460EX) || defined(CONFIG_460GT) || \
+ defined(CONFIG_460SX)
/*
* On some 440er platforms the cache is enabled in the first TLB (Boot-CS)
* to speed up the boot process. Now this cache needs to be disabled.
dccci 0,0 /* Invalidate data cache, now no longer our stack */
sync
isync
- addi r1,r0,0x0000 /* TLB entry #0 */
+#ifdef CONFIG_SYS_TLB_FOR_BOOT_FLASH
+ addi r1,r0,CONFIG_SYS_TLB_FOR_BOOT_FLASH /* Use defined TLB */
+#else
+ addi r1,r0,0x0000 /* Default TLB entry is #0 */
+#endif /* CONFIG_SYS_TLB_FOR_BOOT_FLASH */
tlbre r0,r1,0x0002 /* Read contents */
ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
tlbwe r0,r1,0x0002 /* Save it out */
sync
isync
-#endif
+#endif /* defined(CONFIG_440EP) || ... || defined(CONFIG_460GT) */
mr r1, r3 /* Set new stack pointer */
mr r9, r4 /* Save copy of Init Data pointer */
mr r10, r5 /* Save copy of Destination Address */
mr r3, r5 /* Destination Address */
- lis r4, CFG_MONITOR_BASE@h /* Source Address */
- ori r4, r4, CFG_MONITOR_BASE@l
+ lis r4, CONFIG_SYS_MONITOR_BASE@h /* Source Address */
+ ori r4, r4, CONFIG_SYS_MONITOR_BASE@l
lwz r5, GOT(__init_end)
sub r5, r5, r4
li r6, L1_CACHE_BYTES /* Cache Line Size */
/*
* Fix GOT pointer:
*
- * New GOT-PTR = (old GOT-PTR - CFG_MONITOR_BASE) + Destination Address
+ * New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
*
* Offset:
*/
/* First our own GOT */
add r14, r14, r15
- /* the the one used by the C code */
+ /* then the one used by the C code */
add r30, r30, r15
/*
lwz r4,GOT(_end)
cmplw 0, r3, r4
- beq 6f
+ beq 7f
li r0, 0
-5:
+
+ andi. r5, r4, 3
+ beq 6f
+ sub r4, r4, r5
+ mtctr r5
+ mr r5, r4
+5: stb r0, 0(r5)
+ addi r5, r5, 1
+ bdnz 5b
+6:
stw r0, 0(r3)
addi r3, r3, 4
cmplw 0, r3, r4
- bne 5b
-6:
+ bne 6b
+7:
mr r3, r9 /* Init Data pointer */
mr r4, r10 /* Destination Address */
bl board_init_r
sync
blr
function_epilog(dcbz_area)
-
-/*----------------------------------------------------------------------------+
-| dflush. Assume 32K at vector address is cachable.
-+----------------------------------------------------------------------------*/
- function_prolog(dflush)
- mfmsr r9
- rlwinm r8,r9,0,15,13
- rlwinm r8,r8,0,17,15
- mtmsr r8
- addi r3,r0,0x0000
- mtspr dvlim,r3
- mfspr r3,ivpr
- addi r4,r0,1024
- mtctr r4
-..dflush_loop:
- lwz r6,0x0(r3)
- addi r3,r3,32
- bdnz ..dflush_loop
- addi r3,r3,-32
- mtctr r4
-..ag: dcbf r0,r3
- addi r3,r3,-32
- bdnz ..ag
- sync
- mtmsr r9
- blr
- function_epilog(dflush)
#endif /* CONFIG_440 */
#endif /* CONFIG_NAND_SPL */
lis r3,GPIO0_OSRH@h /* config GPIO output select */
ori r3,r3,GPIO0_OSRH@l
- lis r4,CFG_GPIO0_OSRH@h
- ori r4,r4,CFG_GPIO0_OSRH@l
+ lis r4,CONFIG_SYS_GPIO0_OSRH@h
+ ori r4,r4,CONFIG_SYS_GPIO0_OSRH@l
stw r4,0(r3)
lis r3,GPIO0_OSRL@h
ori r3,r3,GPIO0_OSRL@l
- lis r4,CFG_GPIO0_OSRL@h
- ori r4,r4,CFG_GPIO0_OSRL@l
+ lis r4,CONFIG_SYS_GPIO0_OSRL@h
+ ori r4,r4,CONFIG_SYS_GPIO0_OSRL@l
stw r4,0(r3)
lis r3,GPIO0_ISR1H@h /* config GPIO input select */
ori r3,r3,GPIO0_ISR1H@l
- lis r4,CFG_GPIO0_ISR1H@h
- ori r4,r4,CFG_GPIO0_ISR1H@l
+ lis r4,CONFIG_SYS_GPIO0_ISR1H@h
+ ori r4,r4,CONFIG_SYS_GPIO0_ISR1H@l
stw r4,0(r3)
lis r3,GPIO0_ISR1L@h
ori r3,r3,GPIO0_ISR1L@l
- lis r4,CFG_GPIO0_ISR1L@h
- ori r4,r4,CFG_GPIO0_ISR1L@l
+ lis r4,CONFIG_SYS_GPIO0_ISR1L@h
+ ori r4,r4,CONFIG_SYS_GPIO0_ISR1L@l
stw r4,0(r3)
lis r3,GPIO0_TSRH@h /* config GPIO three-state select */
ori r3,r3,GPIO0_TSRH@l
- lis r4,CFG_GPIO0_TSRH@h
- ori r4,r4,CFG_GPIO0_TSRH@l
+ lis r4,CONFIG_SYS_GPIO0_TSRH@h
+ ori r4,r4,CONFIG_SYS_GPIO0_TSRH@l
stw r4,0(r3)
lis r3,GPIO0_TSRL@h
ori r3,r3,GPIO0_TSRL@l
- lis r4,CFG_GPIO0_TSRL@h
- ori r4,r4,CFG_GPIO0_TSRL@l
+ lis r4,CONFIG_SYS_GPIO0_TSRL@h
+ ori r4,r4,CONFIG_SYS_GPIO0_TSRL@l
stw r4,0(r3)
lis r3,GPIO0_TCR@h /* config GPIO driver output enables */
ori r3,r3,GPIO0_TCR@l
- lis r4,CFG_GPIO0_TCR@h
- ori r4,r4,CFG_GPIO0_TCR@l
+ lis r4,CONFIG_SYS_GPIO0_TCR@h
+ ori r4,r4,CONFIG_SYS_GPIO0_TCR@l
stw r4,0(r3)
li r3,pb1ap /* program EBC bank 1 for RTC access */
mtdcr ebccfga,r3
- lis r3,CFG_EBC_PB1AP@h
- ori r3,r3,CFG_EBC_PB1AP@l
+ lis r3,CONFIG_SYS_EBC_PB1AP@h
+ ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
mtdcr ebccfgd,r3
li r3,pb1cr
mtdcr ebccfga,r3
- lis r3,CFG_EBC_PB1CR@h
- ori r3,r3,CFG_EBC_PB1CR@l
+ lis r3,CONFIG_SYS_EBC_PB1CR@h
+ ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
mtdcr ebccfgd,r3
li r3,pb1ap /* program EBC bank 1 for RTC access */
mtdcr ebccfga,r3
- lis r3,CFG_EBC_PB1AP@h
- ori r3,r3,CFG_EBC_PB1AP@l
+ lis r3,CONFIG_SYS_EBC_PB1AP@h
+ ori r3,r3,CONFIG_SYS_EBC_PB1AP@l
mtdcr ebccfgd,r3
li r3,pb1cr
mtdcr ebccfga,r3
- lis r3,CFG_EBC_PB1CR@h
- ori r3,r3,CFG_EBC_PB1CR@l
+ lis r3,CONFIG_SYS_EBC_PB1CR@h
+ ori r3,r3,CONFIG_SYS_EBC_PB1CR@l
mtdcr ebccfgd,r3
li r3,pb4ap /* program EBC bank 4 for FPGA access */
mtdcr ebccfga,r3
- lis r3,CFG_EBC_PB4AP@h
- ori r3,r3,CFG_EBC_PB4AP@l
+ lis r3,CONFIG_SYS_EBC_PB4AP@h
+ ori r3,r3,CONFIG_SYS_EBC_PB4AP@l
mtdcr ebccfgd,r3
li r3,pb4cr
mtdcr ebccfga,r3
- lis r3,CFG_EBC_PB4CR@h
- ori r3,r3,CFG_EBC_PB4CR@l
+ lis r3,CONFIG_SYS_EBC_PB4CR@h
+ ori r3,r3,CONFIG_SYS_EBC_PB4CR@l
mtdcr ebccfgd,r3
#endif
!-----------------------------------------------------------------------
*/
mfdcr r5, CPC0_PLLMR1
- rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
+ rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
cmpi cr0,0,r4,0x1
- beq pll_done /* if SSCS =b'1' then PLL has */
- /* already been set */
- /* and CPU has been reset */
- /* so skip to next section */
+ beq pll_done /* if SSCS =b'1' then PLL has */
+ /* already been set */
+ /* and CPU has been reset */
+ /* so skip to next section */
#ifdef CONFIG_BUBINGA
/*
lwz r4, 0(r3)
addis r5,0,NVRVFY1@h
addi r5,r5,NVRVFY1@l
- cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
+ cmp cr0,0,r4,r5 /* Compare 1st NVRAM Magic number*/
bne ..no_pllset
addi r3,r3,4
lwz r4, 0(r3)
addis r5,0,NVRVFY2@h
addi r5,r5,NVRVFY2@l
- cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
+ cmp cr0,0,r4,r5 /* Compare 2 NVRAM Magic number */
bne ..no_pllset
addi r3,r3,8 /* Skip over conf_size */
lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
#if defined(CONFIG_ZEUS)
mfdcr r4, CPC0_BOOT
andi. r5, r4, CPC0_BOOT_SEP@l
- bne strap_1 /* serial eeprom present */
+ bne strap_1 /* serial eeprom present */
lis r3,0x0000
addi r3,r3,0x3030
lis r4,0x8042
b 1f
#endif
- addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
- ori r3,r3,PLLMR0_DEFAULT@l /* */
- addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
- ori r4,r4,PLLMR1_DEFAULT@l /* */
+ addis r3,0,PLLMR0_DEFAULT@h /* PLLMR0 default value */
+ ori r3,r3,PLLMR0_DEFAULT@l /* */
+ addis r4,0,PLLMR1_DEFAULT@h /* PLLMR1 default value */
+ ori r4,r4,PLLMR1_DEFAULT@l /* */
#ifdef CONFIG_TAIHU
b 1f
#endif /* CONFIG_TAIHU */
1:
- b pll_write /* Write the CPC0_PLLMR with new value */
+ b pll_write /* Write the CPC0_PLLMR with new value */
pll_done:
/*
pci_wait:
bdnz pci_wait
- blr /* return to main code */
+ blr /* return to main code */
/*
!-----------------------------------------------------------------------------
pll_write:
mfdcr r5, CPC0_UCR
andis. r5,r5,0xFFFF
- ori r5,r5,0x0101 /* Stop the UART clocks */
- mtdcr CPC0_UCR,r5 /* Before changing PLL */
+ ori r5,r5,0x0101 /* Stop the UART clocks */
+ mtdcr CPC0_UCR,r5 /* Before changing PLL */
mfdcr r5, CPC0_PLLMR1
- rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
+ rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
mtdcr CPC0_PLLMR1,r5
- oris r5,r5,0x4000 /* Set PLL Reset */
+ oris r5,r5,0x4000 /* Set PLL Reset */
mtdcr CPC0_PLLMR1,r5
- mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
- rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
- oris r5,r5,0x4000 /* Set PLL Reset */
- mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
- rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
+ mtdcr CPC0_PLLMR0,r3 /* Set clock dividers */
+ rlwinm r5,r4,0,0x3FFFFFFF /* Reset & Bypass new PLL dividers */
+ oris r5,r5,0x4000 /* Set PLL Reset */
+ mtdcr CPC0_PLLMR1,r5 /* Set clock dividers */
+ rlwinm r5,r5,0,0xBFFFFFFF /* Clear PLL Reset */
mtdcr CPC0_PLLMR1,r5
/*
* Not sure if this is needed...
*/
addis r3,0,0x1000
- mtspr dbcr0,r3 /* This will cause a CPU core reset, and */
- /* execution will continue from the poweron */
- /* vector of 0xfffffffc */
+ mtspr dbcr0,r3 /* This will cause a CPU core reset, and */
+ /* execution will continue from the poweron */
+ /* vector of 0xfffffffc */
#endif /* CONFIG_405EP */
#if defined(CONFIG_440)
blr
function_epilog(mftlb1)
#endif /* CONFIG_440 */
+
+#if defined(CONFIG_NAND_SPL)
+/*
+ * void nand_boot_relocate(dst, src, bytes)
+ *
+ * r3 = Destination address to copy code to (in SDRAM)
+ * r4 = Source address to copy code from
+ * r5 = size to copy in bytes
+ */
+nand_boot_relocate:
+ mr r6,r3
+ mr r7,r4
+ mflr r8
+
+ /*
+ * Copy SPL from icache into SDRAM
+ */
+ subi r3,r3,4
+ subi r4,r4,4
+ srwi r5,r5,2
+ mtctr r5
+..spl_loop:
+ lwzu r0,4(r4)
+ stwu r0,4(r3)
+ bdnz ..spl_loop
+
+ /*
+ * Calculate "corrected" link register, so that we "continue"
+ * in execution in destination range
+ */
+ sub r3,r7,r6 /* r3 = src - dst */
+ sub r8,r8,r3 /* r8 = link-reg - (src - dst) */
+ mtlr r8
+ blr
+
+nand_boot_common:
+ /*
+ * First initialize SDRAM. It has to be available *before* calling
+ * nand_boot().
+ */
+ lis r3,CONFIG_SYS_SDRAM_BASE@h
+ ori r3,r3,CONFIG_SYS_SDRAM_BASE@l
+ bl initdram
+
+ /*
+ * Now copy the 4k SPL code into SDRAM and continue execution
+ * from there.
+ */
+ lis r3,CONFIG_SYS_NAND_BOOT_SPL_DST@h
+ ori r3,r3,CONFIG_SYS_NAND_BOOT_SPL_DST@l
+ lis r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@h
+ ori r4,r4,CONFIG_SYS_NAND_BOOT_SPL_SRC@l
+ lis r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@h
+ ori r5,r5,CONFIG_SYS_NAND_BOOT_SPL_SIZE@l
+ bl nand_boot_relocate
+
+ /*
+ * We're running from SDRAM now!!!
+ *
+ * It is necessary for 4xx systems to relocate from running at
+ * the original location (0xfffffxxx) to somewhere else (SDRAM
+ * preferably). This is because CS0 needs to be reconfigured for
+ * NAND access. And we can't reconfigure this CS when currently
+ * "running" from it.
+ */
+
+ /*
+ * Finally call nand_boot() to load main NAND U-Boot image from
+ * NAND and jump to it.
+ */
+ bl nand_boot /* will not return */
+#endif /* CONFIG_NAND_SPL */
projects / karo-tx-uboot.git / blobdiff