#include <mpc5xxx.h>
#include <version.h>
-#define CONFIG_MPC5XXX 1 /* needed for Linux kernel header files */
+#define CONFIG_MPC5xxx 1 /* needed for Linux kernel header files */
#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
#include <ppc_asm.tmpl>
boot_warm:
mfmsr r5 /* save msr contents */
-#if defined(CFG_DEFAULT_MBAR)
+ /* Move CSBoot and adjust instruction pointer */
+ /*--------------------------------------------------------------*/
+
+#if defined(CFG_LOWBOOT)
+# if defined(CFG_RAMBOOT)
+# error CFG_LOWBOOT is incompatible with CFG_RAMBOOT
+# endif /* CFG_RAMBOOT */
+# if defined(CONFIG_MGT5100)
+# error CFG_LOWBOOT is incompatible with MGT5100
+# endif /* CONFIG_MGT5100 */
+ lis r4, CFG_DEFAULT_MBAR@h
+ lis r3, START_REG(CFG_BOOTCS_START)@h
+ ori r3, r3, START_REG(CFG_BOOTCS_START)@l
+ stw r3, 0x4(r4) /* CS0 start */
+ lis r3, STOP_REG(CFG_BOOTCS_START, CFG_BOOTCS_SIZE)@h
+ ori r3, r3, STOP_REG(CFG_BOOTCS_START, CFG_BOOTCS_SIZE)@l
+ stw r3, 0x8(r4) /* CS0 stop */
+ lis r3, 0x02010000@h
+ ori r3, r3, 0x02010000@l
+ stw r3, 0x54(r4) /* CS0 and Boot enable */
+
+ lis r3, lowboot_reentry@h /* jump from bootlow address space (0x0000xxxx) */
+ ori r3, r3, lowboot_reentry@l /* to the address space the linker used */
+ mtlr r3
+ blr
+
+lowboot_reentry:
+ lis r3, START_REG(CFG_BOOTCS_START)@h
+ ori r3, r3, START_REG(CFG_BOOTCS_START)@l
+ stw r3, 0x4c(r4) /* Boot start */
+ lis r3, STOP_REG(CFG_BOOTCS_START, CFG_BOOTCS_SIZE)@h
+ ori r3, r3, STOP_REG(CFG_BOOTCS_START, CFG_BOOTCS_SIZE)@l
+ stw r3, 0x50(r4) /* Boot stop */
+ lis r3, 0x02000001@h
+ ori r3, r3, 0x02000001@l
+ stw r3, 0x54(r4) /* Boot enable, CS0 disable */
+#endif /* CFG_LOWBOOT */
+
+#if defined(CFG_DEFAULT_MBAR) && !defined(CFG_RAMBOOT)
lis r3, CFG_MBAR@h
ori r3, r3, CFG_MBAR@l
#if defined(CONFIG_MPC5200)
+ /* MBAR is mirrored into the MBAR SPR */
+ mtspr MBAR,r3
rlwinm r3, r3, 16, 16, 31
#endif
#if defined(CONFIG_MGT5100)
/* Alignment exception. */
. = 0x600
Alignment:
- EXCEPTION_PROLOG
+ EXCEPTION_PROLOG(SRR0, SRR1)
mfspr r4,DAR
stw r4,_DAR(r21)
mfspr r5,DSISR
/* Program check exception */
. = 0x700
ProgramCheck:
- EXCEPTION_PROLOG
+ EXCEPTION_PROLOG(SRR0, SRR1)
addi r3,r1,STACK_FRAME_OVERHEAD
li r20,MSR_KERNEL
rlwimi r20,r23,0,16,16 /* copy EE bit from saved MSR */
STD_EXCEPTION(0xa00, Trap_0a, UnknownException)
STD_EXCEPTION(0xb00, Trap_0b, UnknownException)
-
- . = 0xc00
-/*
- * r0 - SYSCALL number
- * r3-... arguments
- */
-SystemCall:
- addis r11,r0,0 /* get functions table addr */
- ori r11,r11,0 /* Note: this code is patched in trap_init */
- addis r12,r0,0 /* get number of functions */
- ori r12,r12,0
-
- cmplw 0, r0, r12
- bge 1f
-
- rlwinm r0,r0,2,0,31 /* fn_addr = fn_tbl[r0] */
- add r11,r11,r0
- lwz r11,0(r11)
-
- li r20,0xd00-4 /* Get stack pointer */
- lwz r12,0(r20)
- subi r12,r12,12 /* Adjust stack pointer */
- li r0,0xc00+_end_back-SystemCall
- cmplw 0, r0, r12 /* Check stack overflow */
- bgt 1f
- stw r12,0(r20)
-
- mflr r0
- stw r0,0(r12)
- mfspr r0,SRR0
- stw r0,4(r12)
- mfspr r0,SRR1
- stw r0,8(r12)
-
- li r12,0xc00+_back-SystemCall
- mtlr r12
- mtspr SRR0,r11
-
-1: SYNC
- rfi
-
-_back:
-
- mfmsr r11 /* Disable interrupts */
- li r12,0
- ori r12,r12,MSR_EE
- andc r11,r11,r12
- SYNC /* Some chip revs need this... */
- mtmsr r11
- SYNC
-
- li r12,0xd00-4 /* restore regs */
- lwz r12,0(r12)
-
- lwz r11,0(r12)
- mtlr r11
- lwz r11,4(r12)
- mtspr SRR0,r11
- lwz r11,8(r12)
- mtspr SRR1,r11
-
- addi r12,r12,12 /* Adjust stack pointer */
- li r20,0xd00-4
- stw r12,0(r20)
-
- SYNC
- rfi
-_end_back:
-
+ STD_EXCEPTION(0xc00, SystemCall, UnknownException)
STD_EXCEPTION(0xd00, SingleStep, UnknownException)
STD_EXCEPTION(0xe00, Trap_0e, UnknownException)
mtspr DBAT2L, r0
mtspr DBAT3U, r0
mtspr DBAT3L, r0
+ mtspr DBAT4U, r0
+ mtspr DBAT4L, r0
+ mtspr DBAT5U, r0
+ mtspr DBAT5L, r0
+ mtspr DBAT6U, r0
+ mtspr DBAT6L, r0
+ mtspr DBAT7U, r0
+ mtspr DBAT7L, r0
mtspr IBAT0U, r0
mtspr IBAT0L, r0
mtspr IBAT1U, r0
mtspr IBAT2L, r0
mtspr IBAT3U, r0
mtspr IBAT3L, r0
+ mtspr IBAT4U, r0
+ mtspr IBAT4L, r0
+ mtspr IBAT5U, r0
+ mtspr IBAT5L, r0
+ mtspr IBAT6U, r0
+ mtspr IBAT6L, r0
+ mtspr IBAT7U, r0
+ mtspr IBAT7L, r0
SYNC
/* invalidate all tlb's */
rlwinm r3, r3, HID0_DCE_BITPOS + 1, 31, 31
blr
+ .globl get_svr
+get_svr:
+ mfspr r3, SVR
+ blr
+
.globl get_pvr
get_pvr:
mfspr r3, PVR
projects / oweals / u-boot.git / blobdiff