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authorWolfgang Denk <wd@pollux.denx.de>2005-08-06 01:42:58 +0200
committerWolfgang Denk <wd@pollux.denx.de>2005-08-06 01:42:58 +0200
commitf901a83b70a586cef89682843e2d16d6c7b2288a (patch)
tree139e02c9726dd0b2786f644a1a646e3d6fba028b /cpu/ppc4xx
parent5633796c090340238b025dff4b8107be8509a68b (diff)
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Add support for ep8248 board
Patch by Yuli Barcohen, 12 Dec 2004 Minor code cleanup.
Diffstat (limited to 'cpu/ppc4xx')
-rw-r--r--cpu/ppc4xx/start.S248
1 files changed, 124 insertions, 124 deletions
diff --git a/cpu/ppc4xx/start.S b/cpu/ppc4xx/start.S
index 788c71c..730f3ca 100644
--- a/cpu/ppc4xx/start.S
+++ b/cpu/ppc4xx/start.S
@@ -158,8 +158,8 @@ _start_440:
/*----------------------------------------------------------------*/
/* Clear and set up some registers. */
/*----------------------------------------------------------------*/
- iccci r0,r0 /* NOTE: operands not used for 440 */
- dccci r0,r0 /* NOTE: operands not used for 440 */
+ iccci r0,r0 /* NOTE: operands not used for 440 */
+ dccci r0,r0 /* NOTE: operands not used for 440 */
sync
li r0,0
mtspr srr0,r0
@@ -167,10 +167,10 @@ _start_440:
mtspr csrr0,r0
mtspr csrr1,r0
#if defined (CONFIG_440_GX) /* NOTE: 440GX adds machine check status regs */
- mtspr mcsrr0,r0
- mtspr mcsrr1,r0
- mfspr r1, mcsr
- mtspr mcsr,r1
+ mtspr mcsrr0,r0
+ mtspr mcsrr1,r0
+ mfspr r1, mcsr
+ mtspr mcsr,r1
#endif
/*----------------------------------------------------------------*/
/* Initialize debug */
@@ -204,13 +204,13 @@ _start_440:
/* Setup interrupt vectors */
/*----------------------------------------------------------------*/
mtspr ivpr,r0 /* Vectors start at 0x0000_0000 */
- li r1,0x0100
+ li r1,0x0100
mtspr ivor0,r1 /* Critical input */
- li r1,0x0200
+ li r1,0x0200
mtspr ivor1,r1 /* Machine check */
- li r1,0x0300
+ li r1,0x0300
mtspr ivor2,r1 /* Data storage */
- li r1,0x0400
+ li r1,0x0400
mtspr ivor3,r1 /* Instruction storage */
li r1,0x0500
mtspr ivor4,r1 /* External interrupt */
@@ -349,8 +349,8 @@ _start:
b __440gx_msr_continue
__440gx_msr_set:
- lis r1, 0x0002 /* set CE bit (Critical Exceptions) */
- ori r1,r1,0x1000 /* set ME bit (Machine Exceptions) */
+ lis r1, 0x0002 /* set CE bit (Critical Exceptions) */
+ ori r1,r1,0x1000 /* set ME bit (Machine Exceptions) */
mtspr srr1,r1
mflr r1
mtspr srr0,r1
@@ -379,23 +379,23 @@ __440gx_msr_continue:
li r0,0
#if defined(CONFIG_440_EP) || defined(CONFIG_440_GR)
/* 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,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_ran
- addi r5,r5,0x0001
+ rlwinm r5,r4,27,5,31
+ beq ..d_ran
+ addi r5,r5,0x0001
..d_ran:
- mtctr r5
+ mtctr r5
..d_ag:
- dcbz r0,r3
- addi r3,r3,32
- bdnz ..d_ag
+ dcbz r0,r3
+ addi r3,r3,32
+ bdnz ..d_ag
#else
#if defined (CONFIG_440_GX)
- mtdcr l2_cache_cfg,r0 /* Ensure L2 Cache is off */
+ mtdcr l2_cache_cfg,r0 /* Ensure L2 Cache is off */
#endif
mtdcr isram0_sb1cr,r0 /* Disable bank 1 */
@@ -411,16 +411,16 @@ __440gx_msr_continue:
lis r1,0x8000 /* BAS = 8000_0000 */
#if defined(CONFIG_440_GX)
ori r1,r1,0x0980 /* first 64k */
- mtdcr isram0_sb0cr,r1
+ mtdcr isram0_sb0cr,r1
lis r1,0x8001
ori r1,r1,0x0980 /* second 64k */
- mtdcr isram0_sb1cr,r1
+ mtdcr isram0_sb1cr,r1
lis r1, 0x8002
ori r1,r1, 0x0980 /* third 64k */
- mtdcr isram0_sb2cr,r1
+ mtdcr isram0_sb2cr,r1
lis r1, 0x8003
ori r1,r1, 0x0980 /* fourth 64k */
- mtdcr isram0_sb3cr,r1
+ mtdcr isram0_sb3cr,r1
#else
ori r1,r1,0x0380 /* 8k rw */
mtdcr isram0_sb0cr,r1
@@ -610,11 +610,11 @@ __440gx_msr_continue:
/*----------------------------------------------------------------------- */
/* DMA Status, clear to come up clean */
/*----------------------------------------------------------------------- */
- addis r3,r0, 0xFFFF /* Clear all existing DMA status */
- ori r3,r3, 0xFFFF
- mtdcr dmasr, r3
+ 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)
@@ -624,7 +624,7 @@ __440gx_msr_continue:
/* Setup OCM */
lis r0, 0x7FFF
ori r0, r0, 0xFFFF
- mfdcr r3, ocmiscntl /* get instr-side IRAM config */
+ mfdcr r3, ocmiscntl /* get instr-side IRAM config */
mfdcr r4, ocmdscntl /* get data-side IRAM config */
and r3, r3, r0 /* disable data-side IRAM */
and r4, r4, r0 /* disable data-side IRAM */
@@ -666,13 +666,13 @@ __440gx_msr_continue:
/* set stack pointer and clear stack to known value */
lis r1,CFG_INIT_RAM_ADDR@h
- ori r1,r1,CFG_INIT_SP_OFFSET@l
+ ori r1,r1,CFG_INIT_SP_OFFSET@l
li r4,2048 /* we store 2048 words to stack */
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 */
+ ori r2,r2,CFG_INIT_RAM_END@l /* so cant copy value from r1 */
lis r4,0xdead /* we store 0xdeaddead in the stack */
ori r4,r4,0xdead
@@ -721,7 +721,7 @@ __440gx_msr_continue:
#endif /* CFG_INIT_DCACHE_CS */
/*----------------------------------------------------------------------- */
- /* Initialize SDRAM Controller */
+ /* Initialize SDRAM Controller */
/*----------------------------------------------------------------------- */
bl sdram_init
@@ -747,11 +747,11 @@ __440gx_msr_continue:
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 /* !(CFG_INIT_DCACHE_CS || !CFG_TEM_STACK_OCM) */
GET_GOT /* initialize GOT access */
- bl cpu_init_f /* run low-level CPU init code (from Flash) */
+ bl cpu_init_f /* run low-level CPU init code (from Flash) */
/* NEVER RETURNS! */
bl board_init_f /* run first part of init code (from Flash) */
@@ -976,8 +976,8 @@ invalidate_dcache:
addi r6,0,0x0000 /* clear GPR 6 */
/* Do loop for # of dcache congruence classes. */
#if defined(CONFIG_440_GX) || defined(CONFIG_440_EP) || defined(CONFIG_440_GR)
- lis r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@ha /* TBS for large sized cache */
- ori r7, r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@l
+ lis r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@ha /* TBS for large sized cache */
+ ori r7, r7, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@l
#else
addi r7,r0, (CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)
#endif
@@ -1002,16 +1002,16 @@ flush_dcache:
/* do loop for # of congruence classes. */
#if defined(CONFIG_440_GX) || defined(CONFIG_440_EP) || defined(CONFIG_440_GR)
- lis r10,(CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@ha /* TBS: for large cache sizes */
- ori r10,r10,(CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@l
- lis r11,(CFG_DCACHE_SIZE / 2)@ha /* D cache set size - 2 way sets */
- ori r11,r11,(CFG_DCACHE_SIZE / 2)@l /* D cache set size - 2 way sets */
+ lis r10,(CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@ha /* TBS: for large cache sizes */
+ ori r10,r10,(CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)@l
+ lis r11,(CFG_DCACHE_SIZE / 2)@ha /* D cache set size - 2 way sets */
+ ori r11,r11,(CFG_DCACHE_SIZE / 2)@l /* D cache set size - 2 way sets */
#else
addi r10,r0,(CFG_DCACHE_SIZE / CFG_CACHELINE_SIZE / 2)
addi r11,r0,(CFG_DCACHE_SIZE / 2) /* D cache set size - 2 way sets */
#endif
mtctr r10
- addi r10,r0,(0xE000-0x10000) /* start at 0xFFFFE000 */
+ addi r10,r0,(0xE000-0x10000) /* start at 0xFFFFE000 */
add r11,r10,r11 /* add to get to other side of cache line */
..flush_dcache_loop:
lwz r3,0(r10) /* least recently used side */
@@ -1229,12 +1229,12 @@ ppcSync:
.globl relocate_code
relocate_code:
#if defined(CONFIG_440_EP) || defined(CONFIG_440_GR)
- dccci 0,0 /* Invalidate data cache, now no longer our stack */
+ dccci 0,0 /* Invalidate data cache, now no longer our stack */
sync
- addi r1,r0,0x0000 /* Tlb entry #0 */
+ addi r1,r0,0x0000 /* Tlb entry #0 */
tlbre r0,r1,0x0002 /* Read contents */
- ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
- tlbwe r0,r1,0x0002 /* Save it out */
+ ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
+ tlbwe r0,r1,0x0002 /* Save it out */
isync
#endif
mr r1, r3 /* Set new stack pointer */
@@ -1455,7 +1455,7 @@ trap_reloc:
/**************************************************************************/
-/* PPC405EP specific stuff */
+/* PPC405EP specific stuff */
/**************************************************************************/
#ifdef CONFIG_405EP
ppc405ep_init:
@@ -1539,7 +1539,7 @@ ppc405ep_init:
mtdcr ebccfgd,r3
#endif
- addi r3,0,CPC0_PCI_HOST_CFG_EN
+ addi r3,0,CPC0_PCI_HOST_CFG_EN
#ifdef CONFIG_BUBINGA
/*
!-----------------------------------------------------------------------
@@ -1547,30 +1547,30 @@ ppc405ep_init:
! If board is set to internal arbitration, update cpc0_pci
!-----------------------------------------------------------------------
*/
- addis r5,r0,FPGA_REG1@h /* set offset for FPGA_REG1 */
- ori r5,r5,FPGA_REG1@l
- lbz r5,0x0(r5) /* read to get PCI arb selection */
- andi. r6,r5,FPGA_REG1_PCI_INT_ARB /* using internal arbiter ?*/
- beq ..pci_cfg_set /* if not set, then bypass reg write*/
+ addis r5,r0,FPGA_REG1@h /* set offset for FPGA_REG1 */
+ ori r5,r5,FPGA_REG1@l
+ lbz r5,0x0(r5) /* read to get PCI arb selection */
+ andi. r6,r5,FPGA_REG1_PCI_INT_ARB /* using internal arbiter ?*/
+ beq ..pci_cfg_set /* if not set, then bypass reg write*/
#endif
- ori r3,r3,CPC0_PCI_ARBIT_EN
+ ori r3,r3,CPC0_PCI_ARBIT_EN
..pci_cfg_set:
- mtdcr CPC0_PCI, r3 /* Enable internal arbiter*/
+ mtdcr CPC0_PCI, r3 /* Enable internal arbiter*/
/*
!-----------------------------------------------------------------------
! Check to see if chip is in bypass mode.
! If so, write stored CPC0_PLLMR0 and CPC0_PLLMR1 values and perform a
! CPU reset Otherwise, skip this step and keep going.
- ! Note: Running BIOS in bypass mode is not supported since PLB speed
- ! will not be fast enough for the SDRAM (min 66MHz)
+ ! Note: Running BIOS in bypass mode is not supported since PLB speed
+ ! will not be fast enough for the SDRAM (min 66MHz)
!-----------------------------------------------------------------------
*/
- mfdcr r5, CPC0_PLLMR1
- rlwinm r4,r5,1,0x1 /* get system clock source (SSCS) */
- cmpi cr0,0,r4,0x1
+ mfdcr r5, CPC0_PLLMR1
+ 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 */
+ beq pll_done /* if SSCS =b'1' then PLL has */
/* already been set */
/* and CPU has been reset */
/* so skip to next section */
@@ -1584,40 +1584,40 @@ ppc405ep_init:
! See CPU_DEFAULT_200 and CPU_DEFAULT_266 above.
!
! WARNING: This code assumes the first three words in the nvram_t
- ! structure in openbios.h. Changing the beginning of
- ! the structure will break this code.
+ ! structure in openbios.h. Changing the beginning of
+ ! the structure will break this code.
!
!-----------------------------------------------------------------------
*/
- addis r3,0,NVRAM_BASE@h
- addi r3,r3,NVRAM_BASE@l
-
- lwz r4, 0(r3)
- addis r5,0,NVRVFY1@h
- addi r5,r5,NVRVFY1@l
- 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 */
- bne ..no_pllset
- addi r3,r3,8 /* Skip over conf_size */
- lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
- lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
- rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
- cmpi cr0,0,r5,1 /* See if PLL is locked */
- beq pll_write
+ addis r3,0,NVRAM_BASE@h
+ addi r3,r3,NVRAM_BASE@l
+
+ lwz r4, 0(r3)
+ addis r5,0,NVRVFY1@h
+ addi r5,r5,NVRVFY1@l
+ 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 */
+ bne ..no_pllset
+ addi r3,r3,8 /* Skip over conf_size */
+ lwz r4, 4(r3) /* Load PLLMR1 value from NVRAM */
+ lwz r3, 0(r3) /* Load PLLMR0 value from NVRAM */
+ rlwinm r5,r4,1,0x1 /* get system clock source (SSCS) */
+ cmpi cr0,0,r5,1 /* See if PLL is locked */
+ beq pll_write
..no_pllset:
#endif /* CONFIG_BUBINGA */
- 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 /* */
- b pll_write /* Write the CPC0_PLLMR with new value */
+ b pll_write /* Write the CPC0_PLLMR with new value */
pll_done:
/*
@@ -1626,27 +1626,27 @@ pll_done:
! This is needed to enable PCI if not booting from serial EPROM
!-----------------------------------------------------------------------
*/
- addi r3, 0, 0x0
- mtdcr CPC0_SRR, r3
+ addi r3, 0, 0x0
+ mtdcr CPC0_SRR, r3
- addis r3,0,0x0010
- mtctr r3
+ addis r3,0,0x0010
+ mtctr r3
pci_wait:
- bdnz pci_wait
+ bdnz pci_wait
blr /* return to main code */
/*
!-----------------------------------------------------------------------------
-! Function: pll_write
-! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
-! That is:
-! 1. Pll is first disabled (de-activated by putting in bypass mode)
-! 2. PLL is reset
-! 3. Clock dividers are set while PLL is held in reset and bypassed
-! 4. PLL Reset is cleared
-! 5. Wait 100us for PLL to lock
-! 6. A core reset is performed
+! Function: pll_write
+! Description: Updates the value of the CPC0_PLLMR according to CMOS27E documentation
+! That is:
+! 1. Pll is first disabled (de-activated by putting in bypass mode)
+! 2. PLL is reset
+! 3. Clock dividers are set while PLL is held in reset and bypassed
+! 4. PLL Reset is cleared
+! 5. Wait 100us for PLL to lock
+! 6. A core reset is performed
! Input: r3 = Value to write to CPC0_PLLMR0
! Input: r4 = Value to write to CPC0_PLLMR1
! Output r3 = none
@@ -1655,41 +1655,41 @@ pci_wait:
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 */
- mtdcr CPC0_PLLMR1,r5
- 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_PLLMR1,r5
+ rlwinm r5,r5,0,0x7FFFFFFF /* Disable PLL */
+ mtdcr CPC0_PLLMR1,r5
+ 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_PLLMR1,r5
/*
! Wait min of 100us for PLL to lock.
! See CMOS 27E databook for more info.
! At 200MHz, that means waiting 20,000 instructions
*/
- addi r3,0,20000 /* 2000 = 0x4e20 */
- mtctr r3
+ addi r3,0,20000 /* 2000 = 0x4e20 */
+ mtctr r3
pll_wait:
- bdnz pll_wait
+ bdnz pll_wait
- oris r5,r5,0x8000 /* Enable PLL */
- mtdcr CPC0_PLLMR1,r5 /* Engage */
+ oris r5,r5,0x8000 /* Enable PLL */
+ mtdcr CPC0_PLLMR1,r5 /* Engage */
/*
* Reset CPU to guarantee timings are OK
* Not sure if this is needed...
*/
addis r3,0,0x1000
- mtspr dbcr0,r3 /* This will cause a CPU core reset, and */
+ mtspr dbcr0,r3 /* This will cause a CPU core reset, and */
/* execution will continue from the poweron */
/* vector of 0xfffffffc */
#endif /* CONFIG_405EP */