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u-boot/arch/powerpc/cpu/mpc85xx/start.S
Andy Yan 2b71d098ee powerpc: spl: configure SYS_MALLOC_F_LEN independently for SPL and full U-Boot 
Some platforms have very limited SRAM to run SPL code, so there may
not be the same amount space for a malloc pool before relocation in
the SPL stage as the normal U-Boot stage.

Make SPL and (the full) U-Boot stage use independent SYS_MALLOC_F_LEN,
so the size of pre-relocation malloc pool can be configured memory
space independently.

Signed-off-by: Andy Yan <andy.yan@rock-chips.com>
Acked-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
[fixed up commit-message:]
Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
2017-07-27 14:59:03 +02:00

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/*
* Copyright 2004, 2007-2012 Freescale Semiconductor, Inc.
* Copyright (C) 2003 Motorola,Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
/* U-Boot Startup Code for Motorola 85xx PowerPC based Embedded Boards
*
* The processor starts at 0xfffffffc and the code is first executed in the
* last 4K page(0xfffff000-0xffffffff) in flash/rom.
*
*/
#include <asm-offsets.h>
#include <config.h>
#include <mpc85xx.h>
#include <version.h>
#include <ppc_asm.tmpl>
#include <ppc_defs.h>
#include <asm/cache.h>
#include <asm/mmu.h>
#undef MSR_KERNEL
#define MSR_KERNEL ( MSR_ME ) /* Machine Check */
#define LAW_EN 0x80000000
#if defined(CONFIG_NAND_SPL) || \
(defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_INIT_MINIMAL))
#define MINIMAL_SPL
#endif
#if !defined(CONFIG_SPL) && !defined(CONFIG_SYS_RAMBOOT) && \
!defined(CONFIG_SECURE_BOOT) && !defined(CONFIG_SRIO_PCIE_BOOT_SLAVE)
#define NOR_BOOT
#endif
/*
* Set up GOT: Global Offset Table
*
* Use r12 to access the GOT
*/
START_GOT
GOT_ENTRY(_GOT2_TABLE_)
GOT_ENTRY(_FIXUP_TABLE_)
#ifndef MINIMAL_SPL
GOT_ENTRY(_start)
GOT_ENTRY(_start_of_vectors)
GOT_ENTRY(_end_of_vectors)
GOT_ENTRY(transfer_to_handler)
#endif
GOT_ENTRY(__init_end)
GOT_ENTRY(__bss_end)
GOT_ENTRY(__bss_start)
END_GOT
/*
* e500 Startup -- after reset only the last 4KB of the effective
* address space is mapped in the MMU L2 TLB1 Entry0. The .bootpg
* section is located at THIS LAST page and basically does three
* things: clear some registers, set up exception tables and
* add more TLB entries for 'larger spaces'(e.g. the boot rom) to
* continue the boot procedure.
* Once the boot rom is mapped by TLB entries we can proceed
* with normal startup.
*
*/
.section .bootpg,"ax"
.globl _start_e500
_start_e500:
/* Enable debug exception */
li r1,MSR_DE
mtmsr r1
/*
* If we got an ePAPR device tree pointer passed in as r3, we need that
* later in cpu_init_early_f(). Save it to a safe register before we
* clobber it so that we can fetch it from there later.
*/
mr r24, r3
#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
mfspr r3,SPRN_SVR
rlwinm r3,r3,0,0xff
li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV
cmpw r3,r4
beq 1f
#ifdef CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
li r4,CONFIG_SYS_FSL_ERRATUM_A004510_SVR_REV2
cmpw r3,r4
beq 1f
#endif
/* Not a supported revision affected by erratum */
li r27,0
b 2f
1: li r27,1 /* Remember for later that we have the erratum */
/* Erratum says set bits 55:60 to 001001 */
msync
isync
mfspr r3,SPRN_HDBCR0
li r4,0x48
rlwimi r3,r4,0,0x1f8
mtspr SPRN_HDBCR0,r3
isync
2:
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_A005125
msync
isync
mfspr r3, SPRN_HDBCR0
oris r3, r3, 0x0080
mtspr SPRN_HDBCR0, r3
#endif
#if defined(CONFIG_SECURE_BOOT) && defined(CONFIG_E500MC) && \
!defined(CONFIG_E6500)
/* ISBC uses L2 as stack.
* Disable L2 cache here so that u-boot can enable it later
* as part of it's normal flow
*/
/* Check if L2 is enabled */
mfspr r3, SPRN_L2CSR0
lis r2, L2CSR0_L2E@h
ori r2, r2, L2CSR0_L2E@l
and. r4, r3, r2
beq l2_disabled
mfspr r3, SPRN_L2CSR0
/* Flush L2 cache */
lis r2,(L2CSR0_L2FL)@h
ori r2, r2, (L2CSR0_L2FL)@l
or r3, r2, r3
sync
isync
mtspr SPRN_L2CSR0,r3
isync
1:
mfspr r3, SPRN_L2CSR0
and. r1, r3, r2
bne 1b
mfspr r3, SPRN_L2CSR0
lis r2, L2CSR0_L2E@h
ori r2, r2, L2CSR0_L2E@l
andc r4, r3, r2
sync
isync
mtspr SPRN_L2CSR0,r4
isync
l2_disabled:
#endif
/* clear registers/arrays not reset by hardware */
/* L1 */
li r0,2
mtspr L1CSR0,r0 /* invalidate d-cache */
mtspr L1CSR1,r0 /* invalidate i-cache */
mfspr r1,DBSR
mtspr DBSR,r1 /* Clear all valid bits */
.macro create_tlb1_entry esel ts tsize epn wimg rpn perm phy_high scratch
lis \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
ori \scratch, \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@l
mtspr MAS0, \scratch
lis \scratch, FSL_BOOKE_MAS1(1, 1, 0, \ts, \tsize)@h
ori \scratch, \scratch, FSL_BOOKE_MAS1(1, 1, 0, \ts, \tsize)@l
mtspr MAS1, \scratch
lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
mtspr MAS2, \scratch
lis \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@h
ori \scratch, \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@l
mtspr MAS3, \scratch
lis \scratch, \phy_high@h
ori \scratch, \scratch, \phy_high@l
mtspr MAS7, \scratch
isync
msync
tlbwe
isync
.endm
.macro create_tlb0_entry esel ts tsize epn wimg rpn perm phy_high scratch
lis \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@h
ori \scratch, \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@l
mtspr MAS0, \scratch
lis \scratch, FSL_BOOKE_MAS1(1, 0, 0, \ts, \tsize)@h
ori \scratch, \scratch, FSL_BOOKE_MAS1(1, 0, 0, \ts, \tsize)@l
mtspr MAS1, \scratch
lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
mtspr MAS2, \scratch
lis \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@h
ori \scratch, \scratch, FSL_BOOKE_MAS3(\rpn, 0, \perm)@l
mtspr MAS3, \scratch
lis \scratch, \phy_high@h
ori \scratch, \scratch, \phy_high@l
mtspr MAS7, \scratch
isync
msync
tlbwe
isync
.endm
.macro delete_tlb1_entry esel scratch
lis \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@h
ori \scratch, \scratch, FSL_BOOKE_MAS0(1, \esel, 0)@l
mtspr MAS0, \scratch
li \scratch, 0
mtspr MAS1, \scratch
isync
msync
tlbwe
isync
.endm
.macro delete_tlb0_entry esel epn wimg scratch
lis \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@h
ori \scratch, \scratch, FSL_BOOKE_MAS0(0, \esel, 0)@l
mtspr MAS0, \scratch
li \scratch, 0
mtspr MAS1, \scratch
lis \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@h
ori \scratch, \scratch, FSL_BOOKE_MAS2(\epn, \wimg)@l
mtspr MAS2, \scratch
isync
msync
tlbwe
isync
.endm
/* Interrupt vectors do not fit in minimal SPL. */
#if !defined(MINIMAL_SPL)
/* Setup interrupt vectors */
lis r1,CONFIG_SYS_MONITOR_BASE@h
mtspr IVPR,r1
li r4,CriticalInput@l
mtspr IVOR0,r4 /* 0: Critical input */
li r4,MachineCheck@l
mtspr IVOR1,r4 /* 1: Machine check */
li r4,DataStorage@l
mtspr IVOR2,r4 /* 2: Data storage */
li r4,InstStorage@l
mtspr IVOR3,r4 /* 3: Instruction storage */
li r4,ExtInterrupt@l
mtspr IVOR4,r4 /* 4: External interrupt */
li r4,Alignment@l
mtspr IVOR5,r4 /* 5: Alignment */
li r4,ProgramCheck@l
mtspr IVOR6,r4 /* 6: Program check */
li r4,FPUnavailable@l
mtspr IVOR7,r4 /* 7: floating point unavailable */
li r4,SystemCall@l
mtspr IVOR8,r4 /* 8: System call */
/* 9: Auxiliary processor unavailable(unsupported) */
li r4,Decrementer@l
mtspr IVOR10,r4 /* 10: Decrementer */
li r4,IntervalTimer@l
mtspr IVOR11,r4 /* 11: Interval timer */
li r4,WatchdogTimer@l
mtspr IVOR12,r4 /* 12: Watchdog timer */
li r4,DataTLBError@l
mtspr IVOR13,r4 /* 13: Data TLB error */
li r4,InstructionTLBError@l
mtspr IVOR14,r4 /* 14: Instruction TLB error */
li r4,DebugBreakpoint@l
mtspr IVOR15,r4 /* 15: Debug */
#endif
/* Clear and set up some registers. */
li r0,0x0000
lis r1,0xffff
mtspr DEC,r0 /* prevent dec exceptions */
mttbl r0 /* prevent fit & wdt exceptions */
mttbu r0
mtspr TSR,r1 /* clear all timer exception status */
mtspr TCR,r0 /* disable all */
mtspr ESR,r0 /* clear exception syndrome register */
mtspr MCSR,r0 /* machine check syndrome register */
mtxer r0 /* clear integer exception register */
#ifdef CONFIG_SYS_BOOK3E_HV
mtspr MAS8,r0 /* make sure MAS8 is clear */
#endif
/* Enable Time Base and Select Time Base Clock */
lis r0,HID0_EMCP@h /* Enable machine check */
#if defined(CONFIG_ENABLE_36BIT_PHYS)
ori r0,r0,HID0_ENMAS7@l /* Enable MAS7 */
#endif
#ifndef CONFIG_E500MC
ori r0,r0,HID0_TBEN@l /* Enable Timebase */
#endif
mtspr HID0,r0
#if !defined(CONFIG_E500MC) && !defined(CONFIG_ARCH_QEMU_E500)
li r0,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
mfspr r3,PVR
andi. r3,r3, 0xff
cmpwi r3,0x50@l /* if we are rev 5.0 or greater set MBDD */
blt 1f
/* Set MBDD bit also */
ori r0, r0, HID1_MBDD@l
1:
mtspr HID1,r0
#endif
#ifdef CONFIG_SYS_FSL_ERRATUM_CPU_A003999
mfspr r3,SPRN_HDBCR1
oris r3,r3,0x0100
mtspr SPRN_HDBCR1,r3
#endif
/* Enable Branch Prediction */
#if defined(CONFIG_BTB)
lis r0,BUCSR_ENABLE@h
ori r0,r0,BUCSR_ENABLE@l
mtspr SPRN_BUCSR,r0
#endif
#if defined(CONFIG_SYS_INIT_DBCR)
lis r1,0xffff
ori r1,r1,0xffff
mtspr DBSR,r1 /* Clear all status bits */
lis r0,CONFIG_SYS_INIT_DBCR@h /* DBCR0[IDM] must be set */
ori r0,r0,CONFIG_SYS_INIT_DBCR@l
mtspr DBCR0,r0
#endif
#ifdef CONFIG_ARCH_MPC8569
#define CONFIG_SYS_LBC_ADDR (CONFIG_SYS_CCSRBAR_DEFAULT + 0x5000)
#define CONFIG_SYS_LBCR_ADDR (CONFIG_SYS_LBC_ADDR + 0xd0)
/* MPC8569 Rev.0 silcon needs to set bit 13 of LBCR to allow elBC to
* use address space which is more than 12bits, and it must be done in
* the 4K boot page. So we set this bit here.
*/
/* create a temp mapping TLB0[0] for LBCR */
create_tlb0_entry 0, \
0, BOOKE_PAGESZ_4K, \
CONFIG_SYS_LBC_ADDR, MAS2_I|MAS2_G, \
CONFIG_SYS_LBC_ADDR, MAS3_SW|MAS3_SR, \
0, r6
/* Set LBCR register */
lis r4,CONFIG_SYS_LBCR_ADDR@h
ori r4,r4,CONFIG_SYS_LBCR_ADDR@l
lis r5,CONFIG_SYS_LBC_LBCR@h
ori r5,r5,CONFIG_SYS_LBC_LBCR@l
stw r5,0(r4)
isync
/* invalidate this temp TLB */
lis r4,CONFIG_SYS_LBC_ADDR@h
ori r4,r4,CONFIG_SYS_LBC_ADDR@l
tlbivax 0,r4
isync
#endif /* CONFIG_ARCH_MPC8569 */
/*
* Search for the TLB that covers the code we're executing, and shrink it
* so that it covers only this 4K page. That will ensure that any other
* TLB we create won't interfere with it. We assume that the TLB exists,
* which is why we don't check the Valid bit of MAS1. We also assume
* it is in TLB1.
*
* This is necessary, for example, when booting from the on-chip ROM,
* which (oddly) creates a single 4GB TLB that covers CCSR and DDR.
*/
bl nexti /* Find our address */
nexti: mflr r1 /* R1 = our PC */
li r2, 0
mtspr MAS6, r2 /* Assume the current PID and AS are 0 */
isync
msync
tlbsx 0, r1 /* This must succeed */
mfspr r14, MAS0 /* Save ESEL for later */
rlwinm r14, r14, 16, 0xfff
/* Set the size of the TLB to 4KB */
mfspr r3, MAS1
li r2, 0xF80
andc r3, r3, r2 /* Clear the TSIZE bits */
ori r3, r3, MAS1_TSIZE(BOOKE_PAGESZ_4K)@l
oris r3, r3, MAS1_IPROT@h
mtspr MAS1, r3
/*
* Set the base address of the TLB to our PC. We assume that
* virtual == physical. We also assume that MAS2_EPN == MAS3_RPN.
*/
lis r3, MAS2_EPN@h
ori r3, r3, MAS2_EPN@l /* R3 = MAS2_EPN */
and r1, r1, r3 /* Our PC, rounded down to the nearest page */
mfspr r2, MAS2
andc r2, r2, r3
or r2, r2, r1
#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
cmpwi r27,0
beq 1f
andi. r15, r2, MAS2_I|MAS2_G /* save the old I/G for later */
rlwinm r2, r2, 0, ~MAS2_I
ori r2, r2, MAS2_G
1:
#endif
mtspr MAS2, r2 /* Set the EPN to our PC base address */
mfspr r2, MAS3
andc r2, r2, r3
or r2, r2, r1
mtspr MAS3, r2 /* Set the RPN to our PC base address */
isync
msync
tlbwe
/*
* Clear out any other TLB entries that may exist, to avoid conflicts.
* Our TLB entry is in r14.
*/
li r0, TLBIVAX_ALL | TLBIVAX_TLB0
tlbivax 0, r0
tlbsync
mfspr r4, SPRN_TLB1CFG
rlwinm r4, r4, 0, TLBnCFG_NENTRY_MASK
li r3, 0
mtspr MAS1, r3
1: cmpw r3, r14
rlwinm r5, r3, 16, MAS0_ESEL_MSK
addi r3, r3, 1
beq 2f /* skip the entry we're executing from */
oris r5, r5, MAS0_TLBSEL(1)@h
mtspr MAS0, r5
isync
tlbwe
isync
msync
2: cmpw r3, r4
blt 1b
#if defined(CONFIG_SYS_PPC_E500_DEBUG_TLB) && !defined(MINIMAL_SPL) && \
!defined(CONFIG_SECURE_BOOT)
/*
* TLB entry for debuggging in AS1
* Create temporary TLB entry in AS0 to handle debug exception
* As on debug exception MSR is cleared i.e. Address space is changed
* to 0. A TLB entry (in AS0) is required to handle debug exception generated
* in AS1.
*/
#ifdef NOR_BOOT
/*
* TLB entry is created for IVPR + IVOR15 to map on valid OP code address
* bacause flash's virtual address maps to 0xff800000 - 0xffffffff.
* and this window is outside of 4K boot window.
*/
create_tlb1_entry CONFIG_SYS_PPC_E500_DEBUG_TLB, \
0, BOOKE_PAGESZ_4M, \
CONFIG_SYS_MONITOR_BASE & 0xffc00000, MAS2_I|MAS2_G, \
0xffc00000, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
#else
/*
* TLB entry is created for IVPR + IVOR15 to map on valid OP code address
* because "nexti" will resize TLB to 4K
*/
create_tlb1_entry CONFIG_SYS_PPC_E500_DEBUG_TLB, \
0, BOOKE_PAGESZ_256K, \
CONFIG_SYS_MONITOR_BASE & 0xfffc0000, MAS2_I, \
CONFIG_SYS_MONITOR_BASE & 0xfffc0000, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
#endif
#endif
/*
* Relocate CCSR, if necessary. We relocate CCSR if (obviously) the default
* location is not where we want it. This typically happens on a 36-bit
* system, where we want to move CCSR to near the top of 36-bit address space.
*
* To move CCSR, we create two temporary TLBs, one for the old location, and
* another for the new location. On CoreNet systems, we also need to create
* a special, temporary LAW.
*
* As a general rule, TLB0 is used for short-term TLBs, and TLB1 is used for
* long-term TLBs, so we use TLB0 here.
*/
#if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS)
#if !defined(CONFIG_SYS_CCSRBAR_PHYS_HIGH) || !defined(CONFIG_SYS_CCSRBAR_PHYS_LOW)
#error "CONFIG_SYS_CCSRBAR_PHYS_HIGH and CONFIG_SYS_CCSRBAR_PHYS_LOW) must be defined."
#endif
create_ccsr_new_tlb:
/*
* Create a TLB for the new location of CCSR. Register R8 is reserved
* for the virtual address of this TLB (CONFIG_SYS_CCSRBAR).
*/
lis r8, CONFIG_SYS_CCSRBAR@h
ori r8, r8, CONFIG_SYS_CCSRBAR@l
lis r9, (CONFIG_SYS_CCSRBAR + 0x1000)@h
ori r9, r9, (CONFIG_SYS_CCSRBAR + 0x1000)@l
create_tlb0_entry 0, \
0, BOOKE_PAGESZ_4K, \
CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G, \
CONFIG_SYS_CCSRBAR_PHYS_LOW, MAS3_SW|MAS3_SR, \
CONFIG_SYS_CCSRBAR_PHYS_HIGH, r3
/*
* Create a TLB for the current location of CCSR. Register R9 is reserved
* for the virtual address of this TLB (CONFIG_SYS_CCSRBAR + 0x1000).
*/
create_ccsr_old_tlb:
create_tlb0_entry 1, \
0, BOOKE_PAGESZ_4K, \
CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G, \
CONFIG_SYS_CCSRBAR_DEFAULT, MAS3_SW|MAS3_SR, \
0, r3 /* The default CCSR address is always a 32-bit number */
/*
* We have a TLB for what we think is the current (old) CCSR. Let's
* verify that, otherwise we won't be able to move it.
* CONFIG_SYS_CCSRBAR_DEFAULT is always a 32-bit number, so we only
* need to compare the lower 32 bits of CCSRBAR on CoreNet systems.
*/
verify_old_ccsr:
lis r0, CONFIG_SYS_CCSRBAR_DEFAULT@h
ori r0, r0, CONFIG_SYS_CCSRBAR_DEFAULT@l
#ifdef CONFIG_FSL_CORENET
lwz r1, 4(r9) /* CCSRBARL */
#else
lwz r1, 0(r9) /* CCSRBAR, shifted right by 12 */
slwi r1, r1, 12
#endif
cmpl 0, r0, r1
/*
* If the value we read from CCSRBARL is not what we expect, then
* enter an infinite loop. This will at least allow a debugger to
* halt execution and examine TLBs, etc. There's no point in going
* on.
*/
infinite_debug_loop:
bne infinite_debug_loop
#ifdef CONFIG_FSL_CORENET
#define CCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
#define LAW_SIZE_4K 0xb
#define CCSRBAR_LAWAR (LAW_EN | (0x1e << 20) | LAW_SIZE_4K)
#define CCSRAR_C 0x80000000 /* Commit */
create_temp_law:
/*
* On CoreNet systems, we create the temporary LAW using a special LAW
* target ID of 0x1e. LAWBARH is at offset 0xc00 in CCSR.
*/
lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
lis r2, CCSRBAR_LAWAR@h
ori r2, r2, CCSRBAR_LAWAR@l
stw r0, 0xc00(r9) /* LAWBARH0 */
stw r1, 0xc04(r9) /* LAWBARL0 */
sync
stw r2, 0xc08(r9) /* LAWAR0 */
/*
* Read back from LAWAR to ensure the update is complete. e500mc
* cores also require an isync.
*/
lwz r0, 0xc08(r9) /* LAWAR0 */
isync
/*
* Read the current CCSRBARH and CCSRBARL using load word instructions.
* Follow this with an isync instruction. This forces any outstanding
* accesses to configuration space to completion.
*/
read_old_ccsrbar:
lwz r0, 0(r9) /* CCSRBARH */
lwz r0, 4(r9) /* CCSRBARL */
isync
/*
* Write the new values for CCSRBARH and CCSRBARL to their old
* locations. The CCSRBARH has a shadow register. When the CCSRBARH
* has a new value written it loads a CCSRBARH shadow register. When
* the CCSRBARL is written, the CCSRBARH shadow register contents
* along with the CCSRBARL value are loaded into the CCSRBARH and
* CCSRBARL registers, respectively. Follow this with a sync
* instruction.
*/
write_new_ccsrbar:
lis r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
ori r0, r0, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
lis r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@h
ori r1, r1, CONFIG_SYS_CCSRBAR_PHYS_LOW@l
lis r2, CCSRAR_C@h
ori r2, r2, CCSRAR_C@l
stw r0, 0(r9) /* Write to CCSRBARH */
sync /* Make sure we write to CCSRBARH first */
stw r1, 4(r9) /* Write to CCSRBARL */
sync
/*
* Write a 1 to the commit bit (C) of CCSRAR at the old location.
* Follow this with a sync instruction.
*/
stw r2, 8(r9)
sync
/* Delete the temporary LAW */
delete_temp_law:
li r1, 0
stw r1, 0xc08(r8)
sync
stw r1, 0xc00(r8)
stw r1, 0xc04(r8)
sync
#else /* #ifdef CONFIG_FSL_CORENET */
write_new_ccsrbar:
/*
* Read the current value of CCSRBAR using a load word instruction
* followed by an isync. This forces all accesses to configuration
* space to complete.
*/
sync
lwz r0, 0(r9)
isync
/* CONFIG_SYS_CCSRBAR_PHYS right shifted by 12 */
#define CCSRBAR_PHYS_RS12 ((CONFIG_SYS_CCSRBAR_PHYS_HIGH << 20) | \
(CONFIG_SYS_CCSRBAR_PHYS_LOW >> 12))
/* Write the new value to CCSRBAR. */
lis r0, CCSRBAR_PHYS_RS12@h
ori r0, r0, CCSRBAR_PHYS_RS12@l
stw r0, 0(r9)
sync
/*
* The manual says to perform a load of an address that does not
* access configuration space or the on-chip SRAM using an existing TLB,
* but that doesn't appear to be necessary. We will do the isync,
* though.
*/
isync
/*
* Read the contents of CCSRBAR from its new location, followed by
* another isync.
*/
lwz r0, 0(r8)
isync
#endif /* #ifdef CONFIG_FSL_CORENET */
/* Delete the temporary TLBs */
delete_temp_tlbs:
delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G, r3
delete_tlb0_entry 1, CONFIG_SYS_CCSRBAR + 0x1000, MAS2_I|MAS2_G, r3
#endif /* #if (CONFIG_SYS_CCSRBAR_DEFAULT != CONFIG_SYS_CCSRBAR_PHYS) */
#if defined(CONFIG_SYS_FSL_QORIQ_CHASSIS2) && defined(CONFIG_E6500)
create_ccsr_l2_tlb:
/*
* Create a TLB for the MMR location of CCSR
* to access L2CSR0 register
*/
create_tlb0_entry 0, \
0, BOOKE_PAGESZ_4K, \
CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, \
CONFIG_SYS_CCSRBAR_PHYS_LOW + 0xC20000, MAS3_SW|MAS3_SR, \
CONFIG_SYS_CCSRBAR_PHYS_HIGH, r3
enable_l2_cluster_l2:
/* enable L2 cache */
lis r3, (CONFIG_SYS_CCSRBAR + 0xC20000)@h
ori r3, r3, (CONFIG_SYS_CCSRBAR + 0xC20000)@l
li r4, 33 /* stash id */
stw r4, 4(r3)
lis r4, (L2CSR0_L2FI|L2CSR0_L2LFC)@h
ori r4, r4, (L2CSR0_L2FI|L2CSR0_L2LFC)@l
sync
stw r4, 0(r3) /* invalidate L2 */
/* Poll till the bits are cleared */
1: sync
lwz r0, 0(r3)
twi 0, r0, 0
isync
and. r1, r0, r4
bne 1b
/* L2PE must be set before L2 cache is enabled */
lis r4, (L2CSR0_L2PE)@h
ori r4, r4, (L2CSR0_L2PE)@l
sync
stw r4, 0(r3) /* enable L2 parity/ECC error checking */
/* Poll till the bit is set */
1: sync
lwz r0, 0(r3)
twi 0, r0, 0
isync
and. r1, r0, r4
beq 1b
lis r4, (L2CSR0_L2E|L2CSR0_L2PE)@h
ori r4, r4, (L2CSR0_L2REP_MODE)@l
sync
stw r4, 0(r3) /* enable L2 */
/* Poll till the bit is set */
1: sync
lwz r0, 0(r3)
twi 0, r0, 0
isync
and. r1, r0, r4
beq 1b
delete_ccsr_l2_tlb:
delete_tlb0_entry 0, CONFIG_SYS_CCSRBAR + 0xC20000, MAS2_I|MAS2_G, r3
#endif
/*
* Enable the L1. On e6500, this has to be done
* after the L2 is up.
*/
#ifdef CONFIG_SYS_CACHE_STASHING
/* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
li r2,(32 + 0)
mtspr L1CSR2,r2
#endif
/* Enable/invalidate the I-Cache */
lis r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
ori r2,r2,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
mtspr SPRN_L1CSR1,r2
1:
mfspr r3,SPRN_L1CSR1
and. r1,r3,r2
bne 1b
lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
mtspr SPRN_L1CSR1,r3
isync
2:
mfspr r3,SPRN_L1CSR1
andi. r1,r3,L1CSR1_ICE@l
beq 2b
/* Enable/invalidate the D-Cache */
lis r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@h
ori r2,r2,(L1CSR0_DCFI|L1CSR0_DCLFR)@l
mtspr SPRN_L1CSR0,r2
1:
mfspr r3,SPRN_L1CSR0
and. r1,r3,r2
bne 1b
lis r3,(L1CSR0_CPE|L1CSR0_DCE)@h
ori r3,r3,(L1CSR0_CPE|L1CSR0_DCE)@l
mtspr SPRN_L1CSR0,r3
isync
2:
mfspr r3,SPRN_L1CSR0
andi. r1,r3,L1CSR0_DCE@l
beq 2b
#ifdef CONFIG_SYS_FSL_ERRATUM_A004510
#define DCSR_LAWBARH0 (CONFIG_SYS_CCSRBAR + 0x1000)
#define LAW_SIZE_1M 0x13
#define DCSRBAR_LAWAR (LAW_EN | (0x1d << 20) | LAW_SIZE_1M)
cmpwi r27,0
beq 9f
/*
* Create a TLB entry for CCSR
*
* We're executing out of TLB1 entry in r14, and that's the only
* TLB entry that exists. To allocate some TLB entries for our
* own use, flip a bit high enough that we won't flip it again
* via incrementing.
*/
xori r8, r14, 32
lis r0, MAS0_TLBSEL(1)@h
rlwimi r0, r8, 16, MAS0_ESEL_MSK
lis r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_16M)@h
ori r1, r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_16M)@l
lis r7, CONFIG_SYS_CCSRBAR@h
ori r7, r7, CONFIG_SYS_CCSRBAR@l
ori r2, r7, MAS2_I|MAS2_G
lis r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@h
ori r3, r3, FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS_LOW, 0, (MAS3_SW|MAS3_SR))@l
lis r4, CONFIG_SYS_CCSRBAR_PHYS_HIGH@h
ori r4, r4, CONFIG_SYS_CCSRBAR_PHYS_HIGH@l
mtspr MAS0, r0
mtspr MAS1, r1
mtspr MAS2, r2
mtspr MAS3, r3
mtspr MAS7, r4
isync
tlbwe
isync
msync
/* Map DCSR temporarily to physical address zero */
li r0, 0
lis r3, DCSRBAR_LAWAR@h
ori r3, r3, DCSRBAR_LAWAR@l
stw r0, 0xc00(r7) /* LAWBARH0 */
stw r0, 0xc04(r7) /* LAWBARL0 */
sync
stw r3, 0xc08(r7) /* LAWAR0 */
/* Read back from LAWAR to ensure the update is complete. */
lwz r3, 0xc08(r7) /* LAWAR0 */
isync
/* Create a TLB entry for DCSR at zero */
addi r9, r8, 1
lis r0, MAS0_TLBSEL(1)@h
rlwimi r0, r9, 16, MAS0_ESEL_MSK
lis r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_1M)@h
ori r1, r1, FSL_BOOKE_MAS1(1, 1, 0, 0, BOOKE_PAGESZ_1M)@l
li r6, 0 /* DCSR effective address */
ori r2, r6, MAS2_I|MAS2_G
li r3, MAS3_SW|MAS3_SR
li r4, 0
mtspr MAS0, r0
mtspr MAS1, r1
mtspr MAS2, r2
mtspr MAS3, r3
mtspr MAS7, r4
isync
tlbwe
isync
msync
/* enable the timebase */
#define CTBENR 0xe2084
li r3, 1
addis r4, r7, CTBENR@ha
stw r3, CTBENR@l(r4)
lwz r3, CTBENR@l(r4)
twi 0,r3,0
isync
.macro erratum_set_ccsr offset value
addis r3, r7, \offset@ha
lis r4, \value@h
addi r3, r3, \offset@l
ori r4, r4, \value@l
bl erratum_set_value
.endm
.macro erratum_set_dcsr offset value
addis r3, r6, \offset@ha
lis r4, \value@h
addi r3, r3, \offset@l
ori r4, r4, \value@l
bl erratum_set_value
.endm
erratum_set_dcsr 0xb0e08 0xe0201800
erratum_set_dcsr 0xb0e18 0xe0201800
erratum_set_dcsr 0xb0e38 0xe0400000
erratum_set_dcsr 0xb0008 0x00900000
erratum_set_dcsr 0xb0e40 0xe00a0000
erratum_set_ccsr 0x18600 CONFIG_SYS_FSL_CORENET_SNOOPVEC_COREONLY
#ifdef CONFIG_RAMBOOT_PBL
erratum_set_ccsr 0x10f00 0x495e5000
#else
erratum_set_ccsr 0x10f00 0x415e5000
#endif
erratum_set_ccsr 0x11f00 0x415e5000
/* Make temp mapping uncacheable again, if it was initially */
bl 2f
2: mflr r3
tlbsx 0, r3
mfspr r4, MAS2
rlwimi r4, r15, 0, MAS2_I
rlwimi r4, r15, 0, MAS2_G
mtspr MAS2, r4
isync
tlbwe
isync
msync
/* Clear the cache */
lis r3,(L1CSR1_ICFI|L1CSR1_ICLFR)@h
ori r3,r3,(L1CSR1_ICFI|L1CSR1_ICLFR)@l
sync
isync
mtspr SPRN_L1CSR1,r3
isync
2: sync
mfspr r4,SPRN_L1CSR1
and. r4,r4,r3
bne 2b
lis r3,(L1CSR1_CPE|L1CSR1_ICE)@h
ori r3,r3,(L1CSR1_CPE|L1CSR1_ICE)@l
sync
isync
mtspr SPRN_L1CSR1,r3
isync
2: sync
mfspr r4,SPRN_L1CSR1
and. r4,r4,r3
beq 2b
/* Remove temporary mappings */
lis r0, MAS0_TLBSEL(1)@h
rlwimi r0, r9, 16, MAS0_ESEL_MSK
li r3, 0
mtspr MAS0, r0
mtspr MAS1, r3
isync
tlbwe
isync
msync
li r3, 0
stw r3, 0xc08(r7) /* LAWAR0 */
lwz r3, 0xc08(r7)
isync
lis r0, MAS0_TLBSEL(1)@h
rlwimi r0, r8, 16, MAS0_ESEL_MSK
li r3, 0
mtspr MAS0, r0
mtspr MAS1, r3
isync
tlbwe
isync
msync
b 9f
/* r3 = addr, r4 = value, clobbers r5, r11, r12 */
erratum_set_value:
/* Lock two cache lines into I-Cache */
sync
mfspr r11, SPRN_L1CSR1
rlwinm r11, r11, 0, ~L1CSR1_ICUL
sync
isync
mtspr SPRN_L1CSR1, r11
isync
mflr r12
bl 5f
5: mflr r5
addi r5, r5, 2f - 5b
icbtls 0, 0, r5
addi r5, r5, 64
sync
mfspr r11, SPRN_L1CSR1
3: andi. r11, r11, L1CSR1_ICUL
bne 3b
icbtls 0, 0, r5
addi r5, r5, 64
sync
mfspr r11, SPRN_L1CSR1
3: andi. r11, r11, L1CSR1_ICUL
bne 3b
b 2f
.align 6
/* Inside a locked cacheline, wait a while, write, then wait a while */
2: sync
mfspr r5, SPRN_TBRL
addis r11, r5, 0x10000@h /* wait 65536 timebase ticks */
4: mfspr r5, SPRN_TBRL
subf. r5, r5, r11
bgt 4b
stw r4, 0(r3)
mfspr r5, SPRN_TBRL
addis r11, r5, 0x10000@h /* wait 65536 timebase ticks */
4: mfspr r5, SPRN_TBRL
subf. r5, r5, r11
bgt 4b
sync
/*
* Fill out the rest of this cache line and the next with nops,
* to ensure that nothing outside the locked area will be
* fetched due to a branch.
*/
.rept 19
nop
.endr
sync
mfspr r11, SPRN_L1CSR1
rlwinm r11, r11, 0, ~L1CSR1_ICUL
sync
isync
mtspr SPRN_L1CSR1, r11
isync
mtlr r12
blr
9:
#endif
create_init_ram_area:
lis r6,FSL_BOOKE_MAS0(1, 15, 0)@h
ori r6,r6,FSL_BOOKE_MAS0(1, 15, 0)@l
#ifdef NOR_BOOT
/* create a temp mapping in AS=1 to the 4M boot window */
create_tlb1_entry 15, \
1, BOOKE_PAGESZ_4M, \
CONFIG_SYS_MONITOR_BASE & 0xffc00000, MAS2_I|MAS2_G, \
0xffc00000, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
#elif !defined(CONFIG_SYS_RAMBOOT) && defined(CONFIG_SECURE_BOOT)
/* create a temp mapping in AS = 1 for Flash mapping
* created by PBL for ISBC code
*/
create_tlb1_entry 15, \
1, BOOKE_PAGESZ_1M, \
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
CONFIG_SYS_PBI_FLASH_WINDOW & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
/*
* For Targets without CONFIG_SPL like P3, P5
* and for targets with CONFIG_SPL like T1, T2, T4, only for
* u-boot-spl i.e. CONFIG_SPL_BUILD
*/
#elif defined(CONFIG_RAMBOOT_PBL) && defined(CONFIG_SECURE_BOOT) && \
(!defined(CONFIG_SPL) || defined(CONFIG_SPL_BUILD))
/* create a temp mapping in AS = 1 for mapping CONFIG_SYS_MONITOR_BASE
* to L3 Address configured by PBL for ISBC code
*/
create_tlb1_entry 15, \
1, BOOKE_PAGESZ_1M, \
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
CONFIG_SYS_INIT_L3_ADDR & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
#else
/*
* create a temp mapping in AS=1 to the 1M CONFIG_SYS_MONITOR_BASE space, the main
* image has been relocated to CONFIG_SYS_MONITOR_BASE on the second stage.
*/
create_tlb1_entry 15, \
1, BOOKE_PAGESZ_1M, \
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS2_I|MAS2_G, \
CONFIG_SYS_MONITOR_BASE & 0xfff00000, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
#endif
/* create a temp mapping in AS=1 to the stack */
#if defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW) && \
defined(CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH)
create_tlb1_entry 14, \
1, BOOKE_PAGESZ_16K, \
CONFIG_SYS_INIT_RAM_ADDR, 0, \
CONFIG_SYS_INIT_RAM_ADDR_PHYS_LOW, MAS3_SX|MAS3_SW|MAS3_SR, \
CONFIG_SYS_INIT_RAM_ADDR_PHYS_HIGH, r6
#else
create_tlb1_entry 14, \
1, BOOKE_PAGESZ_16K, \
CONFIG_SYS_INIT_RAM_ADDR, 0, \
CONFIG_SYS_INIT_RAM_ADDR, MAS3_SX|MAS3_SW|MAS3_SR, \
0, r6
#endif
lis r6,MSR_IS|MSR_DS|MSR_DE@h
ori r6,r6,MSR_IS|MSR_DS|MSR_DE@l
lis r7,switch_as@h
ori r7,r7,switch_as@l
mtspr SPRN_SRR0,r7
mtspr SPRN_SRR1,r6
rfi
switch_as:
/* L1 DCache is used for initial RAM */
/* Allocate Initial RAM in data cache.
*/
lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
mfspr r2, L1CFG0
andi. r2, r2, 0x1ff
/* cache size * 1024 / (2 * L1 line size) */
slwi r2, r2, (10 - 1 - L1_CACHE_SHIFT)
mtctr r2
li r0,0
1:
dcbz r0,r3
#ifdef CONFIG_E6500 /* Lock/unlock L2 cache long with L1 */
dcbtls 2, r0, r3
dcbtls 0, r0, r3
#else
dcbtls 0, r0, r3
#endif
addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
bdnz 1b
/* Jump out the last 4K page and continue to 'normal' start */
#if defined(CONFIG_SYS_RAMBOOT) || defined(CONFIG_SPL)
/* We assume that we're already running at the address we're linked at */
b _start_cont
#else
/* Calculate absolute address in FLASH and jump there */
/*--------------------------------------------------------------*/
lis r3,CONFIG_SYS_MONITOR_BASE@h
ori r3,r3,CONFIG_SYS_MONITOR_BASE@l
addi r3,r3,_start_cont - _start
mtlr r3
blr
#endif
.text
.globl _start
_start:
.long 0x27051956 /* U-BOOT Magic Number */
.globl version_string
version_string:
.ascii U_BOOT_VERSION_STRING, "\0"
.align 4
.globl _start_cont
_start_cont:
/* Setup the stack in initial RAM,could be L2-as-SRAM or L1 dcache*/
lis r3,(CONFIG_SYS_INIT_RAM_ADDR)@h
ori r3,r3,((CONFIG_SYS_INIT_SP_OFFSET-16)&~0xf)@l /* Align to 16 */
#if CONFIG_VAL(SYS_MALLOC_F_LEN)
#if CONFIG_VAL(SYS_MALLOC_F_LEN) + GENERATED_GBL_DATA_SIZE > CONFIG_SYS_INIT_RAM_SIZE
#error "SYS_MALLOC_F_LEN too large to fit into initial RAM."
#endif
/* Leave 16+ byte for back chain termination and NULL return address */
subi r3,r3,((CONFIG_VAL(SYS_MALLOC_F_LEN)+16+15)&~0xf)
#endif
/* End of RAM */
lis r4,(CONFIG_SYS_INIT_RAM_ADDR)@h
ori r4,r4,(CONFIG_SYS_INIT_RAM_SIZE)@l
li r0,0
1: subi r4,r4,4
stw r0,0(r4)
cmplw r4,r3
bne 1b
#if CONFIG_VAL(SYS_MALLOC_F_LEN)
lis r4,(CONFIG_SYS_INIT_RAM_ADDR)@h
ori r4,r4,(CONFIG_SYS_GBL_DATA_OFFSET)@l
addi r3,r3,16 /* Pre-relocation malloc area */
stw r3,GD_MALLOC_BASE(r4)
subi r3,r3,16
#endif
li r0,0
stw r0,0(r3) /* Terminate Back Chain */
stw r0,+4(r3) /* NULL return address. */
mr r1,r3 /* Transfer to SP(r1) */
GET_GOT
/* Pass our potential ePAPR device tree pointer to cpu_init_early_f */
mr r3, r24
bl cpu_init_early_f
/* switch back to AS = 0 */
lis r3,(MSR_CE|MSR_ME|MSR_DE)@h
ori r3,r3,(MSR_CE|MSR_ME|MSR_DE)@l
mtmsr r3
isync
bl cpu_init_f /* return boot_flag for calling board_init_f */
bl board_init_f
isync
/* NOTREACHED - board_init_f() does not return */
#ifndef MINIMAL_SPL
.globl _start_of_vectors
_start_of_vectors:
/* Critical input. */
CRIT_EXCEPTION(0x0100, CriticalInput, CritcalInputException)
/* Machine check */
MCK_EXCEPTION(0x200, MachineCheck, MachineCheckException)
/* Data Storage exception. */
STD_EXCEPTION(0x0300, DataStorage, UnknownException)
/* Instruction Storage exception. */
STD_EXCEPTION(0x0400, InstStorage, UnknownException)
/* External Interrupt exception. */
STD_EXCEPTION(0x0500, ExtInterrupt, ExtIntException)
/* Alignment exception. */
Alignment:
EXCEPTION_PROLOG(SRR0, SRR1)
mfspr r4,DAR
stw r4,_DAR(r21)
mfspr r5,DSISR
stw r5,_DSISR(r21)
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_TEMPLATE(0x600, Alignment, AlignmentException,
MSR_KERNEL, COPY_EE)
/* Program check exception */
ProgramCheck:
EXCEPTION_PROLOG(SRR0, SRR1)
addi r3,r1,STACK_FRAME_OVERHEAD
EXC_XFER_TEMPLATE(0x700, ProgramCheck, ProgramCheckException,
MSR_KERNEL, COPY_EE)
/* No FPU on MPC85xx. This exception is not supposed to happen.
*/
STD_EXCEPTION(0x0800, FPUnavailable, UnknownException)
STD_EXCEPTION(0x0900, SystemCall, UnknownException)
STD_EXCEPTION(0x0a00, Decrementer, timer_interrupt)
STD_EXCEPTION(0x0b00, IntervalTimer, UnknownException)
STD_EXCEPTION(0x0c00, WatchdogTimer, UnknownException)
STD_EXCEPTION(0x0d00, DataTLBError, UnknownException)
STD_EXCEPTION(0x0e00, InstructionTLBError, UnknownException)
CRIT_EXCEPTION(0x0f00, DebugBreakpoint, DebugException )
.globl _end_of_vectors
_end_of_vectors:
. = . + (0x100 - ( . & 0xff )) /* align for debug */
/*
* This code finishes saving the registers to the exception frame
* and jumps to the appropriate handler for the exception.
* Register r21 is pointer into trap frame, r1 has new stack pointer.
* r23 is the address of the handler.
*/
.globl transfer_to_handler
transfer_to_handler:
SAVE_GPR(7, r21)
SAVE_4GPRS(8, r21)
SAVE_8GPRS(12, r21)
SAVE_8GPRS(24, r21)
li r22,0
stw r22,RESULT(r21)
mtspr SPRG2,r22 /* r1 is now kernel sp */
mtctr r23 /* virtual address of handler */
mtmsr r20
bctrl
int_return:
mfmsr r28 /* Disable interrupts */
li r4,0
ori r4,r4,MSR_EE
andc r28,r28,r4
SYNC /* Some chip revs need this... */
mtmsr r28
SYNC
lwz r2,_CTR(r1)
lwz r0,_LINK(r1)
mtctr r2
mtlr r0
lwz r2,_XER(r1)
lwz r0,_CCR(r1)
mtspr XER,r2
mtcrf 0xFF,r0
REST_10GPRS(3, r1)
REST_10GPRS(13, r1)
REST_8GPRS(23, r1)
REST_GPR(31, r1)
lwz r2,_NIP(r1) /* Restore environment */
lwz r0,_MSR(r1)
mtspr SRR0,r2
mtspr SRR1,r0
lwz r0,GPR0(r1)
lwz r2,GPR2(r1)
lwz r1,GPR1(r1)
SYNC
rfi
/* Cache functions.
*/
.globl flush_icache
flush_icache:
.globl invalidate_icache
invalidate_icache:
mfspr r0,L1CSR1
ori r0,r0,L1CSR1_ICFI
msync
isync
mtspr L1CSR1,r0
isync
blr /* entire I cache */
.globl invalidate_dcache
invalidate_dcache:
mfspr r0,L1CSR0
ori r0,r0,L1CSR0_DCFI
msync
isync
mtspr L1CSR0,r0
isync
blr
.globl icache_enable
icache_enable:
mflr r8
bl invalidate_icache
mtlr r8
isync
mfspr r4,L1CSR1
ori r4,r4,(L1CSR1_CPE | L1CSR1_ICE)@l
oris r4,r4,(L1CSR1_CPE | L1CSR1_ICE)@h
mtspr L1CSR1,r4
isync
blr
.globl icache_disable
icache_disable:
mfspr r0,L1CSR1
lis r3,0
ori r3,r3,L1CSR1_ICE
andc r0,r0,r3
mtspr L1CSR1,r0
isync
blr
.globl icache_status
icache_status:
mfspr r3,L1CSR1
andi. r3,r3,L1CSR1_ICE
blr
.globl dcache_enable
dcache_enable:
mflr r8
bl invalidate_dcache
mtlr r8
isync
mfspr r0,L1CSR0
ori r0,r0,(L1CSR0_CPE | L1CSR0_DCE)@l
oris r0,r0,(L1CSR0_CPE | L1CSR0_DCE)@h
msync
isync
mtspr L1CSR0,r0
isync
blr
.globl dcache_disable
dcache_disable:
mfspr r3,L1CSR0
lis r4,0
ori r4,r4,L1CSR0_DCE
andc r3,r3,r4
mtspr L1CSR0,r3
isync
blr
.globl dcache_status
dcache_status:
mfspr r3,L1CSR0
andi. r3,r3,L1CSR0_DCE
blr
/*------------------------------------------------------------------------------- */
/* Function: in8 */
/* Description: Input 8 bits */
/*------------------------------------------------------------------------------- */
.globl in8
in8:
lbz r3,0x0000(r3)
blr
/*------------------------------------------------------------------------------- */
/* Function: out8 */
/* Description: Output 8 bits */
/*------------------------------------------------------------------------------- */
.globl out8
out8:
stb r4,0x0000(r3)
sync
blr
/*------------------------------------------------------------------------------- */
/* Function: out16 */
/* Description: Output 16 bits */
/*------------------------------------------------------------------------------- */
.globl out16
out16:
sth r4,0x0000(r3)
sync
blr
/*------------------------------------------------------------------------------- */
/* Function: out16r */
/* Description: Byte reverse and output 16 bits */
/*------------------------------------------------------------------------------- */
.globl out16r
out16r:
sthbrx r4,r0,r3
sync
blr
/*------------------------------------------------------------------------------- */
/* Function: out32 */
/* Description: Output 32 bits */
/*------------------------------------------------------------------------------- */
.globl out32
out32:
stw r4,0x0000(r3)
sync
blr
/*------------------------------------------------------------------------------- */
/* Function: out32r */
/* Description: Byte reverse and output 32 bits */
/*------------------------------------------------------------------------------- */
.globl out32r
out32r:
stwbrx r4,r0,r3
sync
blr
/*------------------------------------------------------------------------------- */
/* Function: in16 */
/* Description: Input 16 bits */
/*------------------------------------------------------------------------------- */
.globl in16
in16:
lhz r3,0x0000(r3)
blr
/*------------------------------------------------------------------------------- */
/* Function: in16r */
/* Description: Input 16 bits and byte reverse */
/*------------------------------------------------------------------------------- */
.globl in16r
in16r:
lhbrx r3,r0,r3
blr
/*------------------------------------------------------------------------------- */
/* Function: in32 */
/* Description: Input 32 bits */
/*------------------------------------------------------------------------------- */
.globl in32
in32:
lwz 3,0x0000(3)
blr
/*------------------------------------------------------------------------------- */
/* Function: in32r */
/* Description: Input 32 bits and byte reverse */
/*------------------------------------------------------------------------------- */
.globl in32r
in32r:
lwbrx r3,r0,r3
blr
#endif /* !MINIMAL_SPL */
/*------------------------------------------------------------------------------*/
/*
* void write_tlb(mas0, mas1, mas2, mas3, mas7)
*/
.globl write_tlb
write_tlb:
mtspr MAS0,r3
mtspr MAS1,r4
mtspr MAS2,r5
mtspr MAS3,r6
#ifdef CONFIG_ENABLE_36BIT_PHYS
mtspr MAS7,r7
#endif
li r3,0
#ifdef CONFIG_SYS_BOOK3E_HV
mtspr MAS8,r3
#endif
isync
tlbwe
msync
isync
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
*/
.globl relocate_code
relocate_code:
mr r1,r3 /* Set new stack pointer */
mr r9,r4 /* Save copy of Init Data pointer */
mr r10,r5 /* Save copy of Destination Address */
GET_GOT
#ifndef CONFIG_SPL_SKIP_RELOCATE
mr r3,r5 /* Destination Address */
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,CONFIG_SYS_CACHELINE_SIZE /* Cache Line Size */
/*
* Fix GOT pointer:
*
* New GOT-PTR = (old GOT-PTR - CONFIG_SYS_MONITOR_BASE) + Destination Address
*
* Offset:
*/
sub r15,r10,r4
/* First our own GOT */
add r12,r12,r15
/* the the one used by the C code */
add r30,r30,r15
/*
* Now relocate code
*/
cmplw cr1,r3,r4
addi r0,r5,3
srwi. r0,r0,2
beq cr1,4f /* In place copy is not necessary */
beq 7f /* Protect against 0 count */
mtctr r0
bge cr1,2f
la r8,-4(r4)
la r7,-4(r3)
1: lwzu r0,4(r8)
stwu r0,4(r7)
bdnz 1b
b 4f
2: slwi r0,r0,2
add r8,r4,r0
add r7,r3,r0
3: lwzu r0,-4(r8)
stwu r0,-4(r7)
bdnz 3b
/*
* Now flush the cache: note that we must start from a cache aligned
* address. Otherwise we might miss one cache line.
*/
4: cmpwi r6,0
add r5,r3,r5
beq 7f /* Always flush prefetch queue in any case */
subi r0,r6,1
andc r3,r3,r0
mr r4,r3
5: dcbst 0,r4
add r4,r4,r6
cmplw r4,r5
blt 5b
sync /* Wait for all dcbst to complete on bus */
mr r4,r3
6: icbi 0,r4
add r4,r4,r6
cmplw r4,r5
blt 6b
7: sync /* Wait for all icbi to complete on bus */
isync
/*
* We are done. Do not return, instead branch to second part of board
* initialization, now running from RAM.
*/
addi r0,r10,in_ram - _start
/*
* As IVPR is going to point RAM address,
* Make sure IVOR15 has valid opcode to support debugger
*/
mtspr IVOR15,r0
/*
* Re-point the IVPR at RAM
*/
mtspr IVPR,r10
mtlr r0
blr /* NEVER RETURNS! */
#endif
.globl in_ram
in_ram:
/*
* Relocation Function, r12 point to got2+0x8000
*
* Adjust got2 pointers, no need to check for 0, this code
* already puts a few entries in the table.
*/
li r0,__got2_entries@sectoff@l
la r3,GOT(_GOT2_TABLE_)
lwz r11,GOT(_GOT2_TABLE_)
mtctr r0
sub r11,r3,r11
addi r3,r3,-4
1: lwzu r0,4(r3)
cmpwi r0,0
beq- 2f
add r0,r0,r11
stw r0,0(r3)
2: bdnz 1b
/*
* Now adjust the fixups and the pointers to the fixups
* in case we need to move ourselves again.
*/
li r0,__fixup_entries@sectoff@l
lwz r3,GOT(_FIXUP_TABLE_)
cmpwi r0,0
mtctr r0
addi r3,r3,-4
beq 4f
3: lwzu r4,4(r3)
lwzux r0,r4,r11
cmpwi r0,0
add r0,r0,r11
stw r4,0(r3)
beq- 5f
stw r0,0(r4)
5: bdnz 3b
4:
clear_bss:
/*
* Now clear BSS segment
*/
lwz r3,GOT(__bss_start)
lwz r4,GOT(__bss_end)
cmplw 0,r3,r4
beq 6f
li r0,0
5:
stw r0,0(r3)
addi r3,r3,4
cmplw 0,r3,r4
blt 5b
6:
mr r3,r9 /* Init Data pointer */
mr r4,r10 /* Destination Address */
bl board_init_r
#ifndef MINIMAL_SPL
/*
* Copy exception vector code to low memory
*
* r3: dest_addr
* r7: source address, r8: end address, r9: target address
*/
.globl trap_init
trap_init:
mflr r11
bl _GLOBAL_OFFSET_TABLE_-4
mflr r12
/* Update IVORs as per relocation */
mtspr IVPR,r3
lwz r4,CriticalInput@got(r12)
mtspr IVOR0,r4 /* 0: Critical input */
lwz r4,MachineCheck@got(r12)
mtspr IVOR1,r4 /* 1: Machine check */
lwz r4,DataStorage@got(r12)
mtspr IVOR2,r4 /* 2: Data storage */
lwz r4,InstStorage@got(r12)
mtspr IVOR3,r4 /* 3: Instruction storage */
lwz r4,ExtInterrupt@got(r12)
mtspr IVOR4,r4 /* 4: External interrupt */
lwz r4,Alignment@got(r12)
mtspr IVOR5,r4 /* 5: Alignment */
lwz r4,ProgramCheck@got(r12)
mtspr IVOR6,r4 /* 6: Program check */
lwz r4,FPUnavailable@got(r12)
mtspr IVOR7,r4 /* 7: floating point unavailable */
lwz r4,SystemCall@got(r12)
mtspr IVOR8,r4 /* 8: System call */
/* 9: Auxiliary processor unavailable(unsupported) */
lwz r4,Decrementer@got(r12)
mtspr IVOR10,r4 /* 10: Decrementer */
lwz r4,IntervalTimer@got(r12)
mtspr IVOR11,r4 /* 11: Interval timer */
lwz r4,WatchdogTimer@got(r12)
mtspr IVOR12,r4 /* 12: Watchdog timer */
lwz r4,DataTLBError@got(r12)
mtspr IVOR13,r4 /* 13: Data TLB error */
lwz r4,InstructionTLBError@got(r12)
mtspr IVOR14,r4 /* 14: Instruction TLB error */
lwz r4,DebugBreakpoint@got(r12)
mtspr IVOR15,r4 /* 15: Debug */
mtlr r11
blr
.globl unlock_ram_in_cache
unlock_ram_in_cache:
/* invalidate the INIT_RAM section */
lis r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@h
ori r3,r3,(CONFIG_SYS_INIT_RAM_ADDR & ~(CONFIG_SYS_CACHELINE_SIZE-1))@l
mfspr r4,L1CFG0
andi. r4,r4,0x1ff
slwi r4,r4,(10 - 1 - L1_CACHE_SHIFT)
mtctr r4
1: dcbi r0,r3
#ifdef CONFIG_E6500 /* lock/unlock L2 cache long with L1 */
dcblc 2, r0, r3
dcblc 0, r0, r3
#else
dcblc r0,r3
#endif
addi r3,r3,CONFIG_SYS_CACHELINE_SIZE
bdnz 1b
sync
/* Invalidate the TLB entries for the cache */
lis r3,CONFIG_SYS_INIT_RAM_ADDR@h
ori r3,r3,CONFIG_SYS_INIT_RAM_ADDR@l
tlbivax 0,r3
addi r3,r3,0x1000
tlbivax 0,r3
addi r3,r3,0x1000
tlbivax 0,r3
addi r3,r3,0x1000
tlbivax 0,r3
isync
blr
.globl flush_dcache
flush_dcache:
mfspr r3,SPRN_L1CFG0
rlwinm r5,r3,9,3 /* Extract cache block size */
twlgti r5,1 /* Only 32 and 64 byte cache blocks
* are currently defined.
*/
li r4,32
subfic r6,r5,2 /* r6 = log2(1KiB / cache block size) -
* log2(number of ways)
*/
slw r5,r4,r5 /* r5 = cache block size */
rlwinm r7,r3,0,0xff /* Extract number of KiB in the cache */
mulli r7,r7,13 /* An 8-way cache will require 13
* loads per set.
*/
slw r7,r7,r6
/* save off HID0 and set DCFA */
mfspr r8,SPRN_HID0
ori r9,r8,HID0_DCFA@l
mtspr SPRN_HID0,r9
isync
lis r4,0
mtctr r7
1: lwz r3,0(r4) /* Load... */
add r4,r4,r5
bdnz 1b
msync
lis r4,0
mtctr r7
1: dcbf 0,r4 /* ...and flush. */
add r4,r4,r5
bdnz 1b
/* restore HID0 */
mtspr SPRN_HID0,r8
isync
blr
#endif /* !MINIMAL_SPL */
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