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/*
* Copyright 2009-2012 Freescale Semiconductor, Inc
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#include <common.h>
#include <asm/processor.h>
#include <asm/mmu.h>
#include <asm/fsl_law.h>
#include <asm/io.h>
DECLARE_GLOBAL_DATA_PTR;
#ifdef CONFIG_A003399_NOR_WORKAROUND
void setup_ifc(void)
{
struct fsl_ifc *ifc_regs = (void *)CONFIG_SYS_IFC_ADDR;
u32 _mas0, _mas1, _mas2, _mas3, _mas7;
phys_addr_t flash_phys = CONFIG_SYS_FLASH_BASE_PHYS;
/*
* Adjust the TLB we were running out of to match the phys addr of the
* chip select we are adjusting and will return to.
*/
flash_phys += (~CONFIG_SYS_AMASK0) + 1 - 4*1024*1024;
_mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(15);
_mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_IPROT |
MAS1_TSIZE(BOOKE_PAGESZ_4M);
_mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_TEXT_BASE, MAS2_I|MAS2_G);
_mas3 = FSL_BOOKE_MAS3(flash_phys, 0, MAS3_SW|MAS3_SR|MAS3_SX);
_mas7 = FSL_BOOKE_MAS7(flash_phys);
mtspr(MAS0, _mas0);
mtspr(MAS1, _mas1);
mtspr(MAS2, _mas2);
mtspr(MAS3, _mas3);
mtspr(MAS7, _mas7);
asm volatile("isync;msync;tlbwe;isync");
#if defined(CONFIG_SYS_PPC_E500_DEBUG_TLB)
/*
* 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.
*
* TLB entry is created for IVPR + IVOR15 to map on valid OP code address
* bacause flash's physical address is going to change as
* CONFIG_SYS_FLASH_BASE_PHYS.
*/
_mas0 = MAS0_TLBSEL(1) |
MAS0_ESEL(CONFIG_SYS_PPC_E500_DEBUG_TLB);
_mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_IPROT |
MAS1_TSIZE(BOOKE_PAGESZ_4M);
_mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_TEXT_BASE, MAS2_I|MAS2_G);
_mas3 = FSL_BOOKE_MAS3(flash_phys, 0, MAS3_SW|MAS3_SR|MAS3_SX);
_mas7 = FSL_BOOKE_MAS7(flash_phys);
mtspr(MAS0, _mas0);
mtspr(MAS1, _mas1);
mtspr(MAS2, _mas2);
mtspr(MAS3, _mas3);
mtspr(MAS7, _mas7);
asm volatile("isync;msync;tlbwe;isync");
#endif
/* Change flash's physical address */
out_be32(&(ifc_regs->cspr_cs[0].cspr), CONFIG_SYS_CSPR0);
out_be32(&(ifc_regs->csor_cs[0].csor), CONFIG_SYS_CSOR0);
out_be32(&(ifc_regs->amask_cs[0].amask), CONFIG_SYS_AMASK0);
return ;
}
#endif
/* We run cpu_init_early_f in AS = 1 */
void cpu_init_early_f(void)
{
u32 mas0, mas1, mas2, mas3, mas7;
int i;
#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549
ccsr_gur_t *gur = (void *)(CONFIG_SYS_MPC85xx_GUTS_ADDR);
#endif
#ifdef CONFIG_A003399_NOR_WORKAROUND
ccsr_l2cache_t *l2cache = (void *)CONFIG_SYS_MPC85xx_L2_ADDR;
u32 *dst, *src;
void (*setup_ifc_sram)(void);
#endif
/* Pointer is writable since we allocated a register for it */
gd = (gd_t *) (CONFIG_SYS_INIT_RAM_ADDR + CONFIG_SYS_GBL_DATA_OFFSET);
/*
* Clear initial global data
* we don't use memset so we can share this code with NAND_SPL
*/
for (i = 0; i < sizeof(gd_t); i++)
((char *)gd)[i] = 0;
mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(13);
mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS | MAS1_TSIZE(BOOKE_PAGESZ_1M);
mas2 = FSL_BOOKE_MAS2(CONFIG_SYS_CCSRBAR, MAS2_I|MAS2_G);
mas3 = FSL_BOOKE_MAS3(CONFIG_SYS_CCSRBAR_PHYS, 0, MAS3_SW|MAS3_SR);
mas7 = FSL_BOOKE_MAS7(CONFIG_SYS_CCSRBAR_PHYS);
write_tlb(mas0, mas1, mas2, mas3, mas7);
/*
* Work Around for IFC Erratum A-003549. This issue is P1010
* specific. LCLK(a free running clk signal) is muxed with IFC_CS3 on P1010 SOC
* Hence specifically selecting CS3.
*/
#ifdef CONFIG_SYS_FSL_ERRATUM_P1010_A003549
setbits_be32(&gur->pmuxcr, MPC85xx_PMUXCR_LCLK_IFC_CS3);
#endif
init_laws();
/*
* Work Around for IFC Erratum A003399, issue will hit only when execution
* from NOR Flash
*/
#ifdef CONFIG_A003399_NOR_WORKAROUND
#define SRAM_BASE_ADDR (0x00000000)
/* TLB for SRAM */
mas0 = MAS0_TLBSEL(1) | MAS0_ESEL(9);
mas1 = MAS1_VALID | MAS1_TID(0) | MAS1_TS |
MAS1_TSIZE(BOOKE_PAGESZ_1M);
mas2 = FSL_BOOKE_MAS2(SRAM_BASE_ADDR, MAS2_I);
mas3 = FSL_BOOKE_MAS3(SRAM_BASE_ADDR, 0, MAS3_SX|MAS3_SW|MAS3_SR);
mas7 = FSL_BOOKE_MAS7(0);
write_tlb(mas0, mas1, mas2, mas3, mas7);
out_be32(&l2cache->l2srbar0, SRAM_BASE_ADDR);
out_be32(&l2cache->l2errdis,
(MPC85xx_L2ERRDIS_MBECC | MPC85xx_L2ERRDIS_SBECC));
out_be32(&l2cache->l2ctl,
(MPC85xx_L2CTL_L2E | MPC85xx_L2CTL_L2SRAM_ENTIRE));
/*
* Copy the code in setup_ifc to L2SRAM. Do a word copy
* because NOR Flash on P1010 does not support byte
* access (Erratum IFC-A002769)
*/
setup_ifc_sram = (void *)SRAM_BASE_ADDR;
dst = (u32 *) SRAM_BASE_ADDR;
src = (u32 *) setup_ifc;
for (i = 0; i < 1024; i++)
*dst++ = *src++;
setup_ifc_sram();
/* CLEANUP */
clrbits_be32(&l2cache->l2ctl,
(MPC85xx_L2CTL_L2E |
MPC85xx_L2CTL_L2SRAM_ENTIRE));
out_be32(&l2cache->l2srbar0, 0x0);
#endif
invalidate_tlb(1);
#if defined(CONFIG_SYS_PPC_E500_DEBUG_TLB) && !defined(CONFIG_SPL_BUILD) && !defined(CONFIG_NAND_SPL)
disable_tlb(CONFIG_SYS_PPC_E500_DEBUG_TLB);
#endif
init_tlbs();
}
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