/* LICENSED MATERIAL - PROGRAM PROPERTY OF I B M */
/*------------------------------------------------------------------------------- */
-/* U-Boot - Startup Code for IBM 4xx PowerPC based Embedded Boards
+/* U-Boot - Startup Code for AMCC 4xx PowerPC based Embedded Boards
*
*
* The processor starts at 0xfffffffc and the code is executed
mtspr srr1,r0
mtspr csrr0,r0
mtspr csrr1,r0
-#if defined (CONFIG_440GX) /* NOTE: 440GX adds machine check status regs */
+#if defined(CONFIG_440GX) || defined(CONFIG_440SP) /* NOTE: 440GX adds machine check status regs */
mtspr mcsrr0,r0
mtspr mcsrr1,r0
mfspr r1, mcsr
mtspr tcr,r0 /* disable all */
mtspr esr,r0 /* clear exception syndrome register */
mtxer r0 /* clear integer exception register */
-#if !defined(CONFIG_440GX)
- lis r1,0x0002 /* set CE bit (Critical Exceptions) */
- ori r1,r1,0x1000 /* set ME bit (Machine Exceptions) */
- mtmsr r1 /* change MSR */
-#elif !defined(CONFIG_440EP) && !defined(CONFIG_440GR)
- bl __440gx_msr_set
- b __440gx_msr_continue
-
-__440gx_msr_set:
- 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
- rfi
-__440gx_msr_continue:
-#endif
/*----------------------------------------------------------------*/
/* Debug setup -- some (not very good) ice's need an event*/
addi r3,r3,32
bdnz ..d_ag
#else
-#if defined (CONFIG_440GX)
+#if defined (CONFIG_440GX) || defined(CONFIG_440SP)
mtdcr l2_cache_cfg,r0 /* Ensure L2 Cache is off */
#endif
mtdcr isram0_sb1cr,r0 /* Disable bank 1 */
mtdcr isram0_pmeg,r1
lis r1,0x8000 /* BAS = 8000_0000 */
-#if defined(CONFIG_440GX)
+#if defined(CONFIG_440GX) || defined(CONFIG_440SP)
ori r1,r1,0x0980 /* first 64k */
mtdcr isram0_sb0cr,r1
lis r1,0x8001
/*----------------------------------------------------------------*/
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 */
stw r0,+12(r1) /* Save return addr (underflow vect) */
GET_GOT
+
+ bl cpu_init_f /* run low-level CPU init code (from Flash) */
bl board_init_f
#endif /* CONFIG_440 */
mtspr esr,r0 /* clear Exception Syndrome Reg */
mttcr r0 /* timer control register */
mtexier r0 /* disable all interrupts */
- addi r4,r0,0x1000 /* set ME bit (Machine Exceptions) */
- oris r4,r4,0x2 /* set CE bit (Critical Exceptions) */
- mtmsr r4 /* change MSR */
addis r4,r0,0xFFFF /* set r4 to 0xFFFFFFFF (status in the */
ori r4,r4,0xFFFF /* dbsr is cleared by setting bits to 1) */
mtdbsr r4 /* clear/reset the dbsr */
mttcr r4 /* clear Timer Control Reg */
mtxer r4 /* clear Fixed-Point Exception Reg */
mtevpr r4 /* clear Exception Vector Prefix Reg */
- addi r4,r0,0x1000 /* set ME bit (Machine Exceptions) */
- oris r4,r4,0x0002 /* set CE bit (Critical Exceptions) */
- mtmsr r4 /* change MSR */
addi r4,r0,(0xFFFF-0x10000) /* set r4 to 0xFFFFFFFF (status in the */
/* dbsr is cleared by setting bits to 1) */
mtdbsr r4 /* clear/reset the dbsr */
invalidate_dcache:
addi r6,0,0x0000 /* clear GPR 6 */
/* Do loop for # of dcache congruence classes. */
-#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
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
/* NOTE: dccci invalidates both */
mtctr r7 /* ways in the D cache */
..dcloop:
mtdccr r10
/* do loop for # of congruence classes. */
-#if defined(CONFIG_440GX) || defined(CONFIG_440EP) || defined(CONFIG_440GR)
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 */
add r11,r10,r11 /* add to get to other side of cache line */
.globl relocate_code
relocate_code:
#if defined(CONFIG_440EP) || defined(CONFIG_440GR)
- dccci 0,0 /* Invalidate data cache, now no longer our stack */
+ /*
+ * 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.
+ */
+ iccci 0,0 /* Invalidate inst cache */
+ dccci 0,0 /* Invalidate data cache, now no longer our stack */
sync
- addi r1,r0,0x0000 /* Tlb entry #0 */
+ isync
+ addi r1,r0,0x0000 /* TLB entry #0 */
tlbre r0,r1,0x0002 /* Read contents */
- ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
+ ori r0,r0,0x0c00 /* Or in the inhibit, write through bit */
tlbwe r0,r1,0x0002 /* Save it out */
+ sync
isync
#endif
mr r1, r3 /* Set new stack pointer */
cmplw 0, r7, r8
blt 4b
+#if !defined(CONFIG_440_GX)
+ addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
+ oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
+ mtmsr r7 /* change MSR */
+#else
+ bl __440gx_msr_set
+ b __440gx_msr_continue
+
+__440gx_msr_set:
+ addi r7,r0,0x1000 /* set ME bit (Machine Exceptions) */
+ oris r7,r7,0x0002 /* set CE bit (Critical Exceptions) */
+ mtspr srr1,r7
+ mflr r7
+ mtspr srr0,r7
+ rfi
+__440gx_msr_continue:
+#endif
+
mtlr r4 /* restore link register */
blr
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