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+/*
+ * Copyright 2008-2010 Freescale Semiconductor, Inc.
+ * Kumar Gala <kumar.gala@freescale.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 <config.h>
+#include <mpc85xx.h>
+#include <version.h>
+
+#define _LINUX_CONFIG_H 1 /* avoid reading Linux autoconf.h file */
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+/* To boot secondary cpus, we need a place for them to start up.
+ * Normally, they start at 0xfffffffc, but that's usually the
+ * firmware, and we don't want to have to run the firmware again.
+ * Instead, the primary cpu will set the BPTR to point here to
+ * this page. We then set up the core, and head to
+ * start_secondary. Note that this means that the code below
+ * must never exceed 1023 instructions (the branch at the end
+ * would then be the 1024th).
+ */
+ .globl __secondary_start_page
+ .align 12
+__secondary_start_page:
+/* First do some preliminary setup */
+ lis r3, HID0_EMCP@h /* enable machine check */
+#ifndef CONFIG_E500MC
+ ori r3,r3,HID0_TBEN@l /* enable Timebase */
+#endif
+#ifdef CONFIG_PHYS_64BIT
+ ori r3,r3,HID0_ENMAS7@l /* enable MAS7 updates */
+#endif
+ mtspr SPRN_HID0,r3
+
+#ifndef CONFIG_E500MC
+ li r3,(HID1_ASTME|HID1_ABE)@l /* Addr streaming & broadcast */
+ mfspr r0,PVR
+ andi. r0,r0,0xff
+ cmpwi r0,0x50@l /* if we are rev 5.0 or greater set MBDD */
+ blt 1f
+ /* Set MBDD bit also */
+ ori r3, r3, HID1_MBDD@l
+1:
+ mtspr SPRN_HID1,r3
+#endif
+
+ /* Enable branch prediction */
+ lis r3,BUCSR_ENABLE@h
+ ori r3,r3,BUCSR_ENABLE@l
+ mtspr SPRN_BUCSR,r3
+
+ /* Ensure TB is 0 */
+ li r3,0
+ mttbl r3
+ mttbu r3
+
+ /* 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
+
+#define toreset(x) (x - __secondary_start_page + 0xfffff000)
+
+ /* get our PIR to figure out our table entry */
+ lis r3,toreset(__spin_table)@h
+ ori r3,r3,toreset(__spin_table)@l
+
+ /* r10 has the base address for the entry */
+ mfspr r0,SPRN_PIR
+#ifdef CONFIG_E500MC
+ rlwinm r4,r0,27,27,31
+#else
+ mr r4,r0
+#endif
+ slwi r8,r4,5
+ add r10,r3,r8
+
+#if defined(CONFIG_E500MC) && defined(CONFIG_SYS_CACHE_STASHING)
+ /* set stash id to (coreID) * 2 + 32 + L1 CT (0) */
+ slwi r8,r4,1
+ addi r8,r8,32
+ mtspr L1CSR2,r8
+#endif
+
+#ifdef CONFIG_BACKSIDE_L2_CACHE
+ /* Enable/invalidate the L2 cache */
+ msync
+ lis r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@h
+ ori r2,r2,(L2CSR0_L2FI|L2CSR0_L2LFC)@l
+ mtspr SPRN_L2CSR0,r2
+1:
+ mfspr r3,SPRN_L2CSR0
+ and. r1,r3,r2
+ bne 1b
+
+#ifdef CONFIG_SYS_CACHE_STASHING
+ /* set stash id to (coreID) * 2 + 32 + L2 (1) */
+ addi r3,r8,1
+ mtspr SPRN_L2CSR1,r3
+#endif
+
+ lis r3,CONFIG_SYS_INIT_L2CSR0@h
+ ori r3,r3,CONFIG_SYS_INIT_L2CSR0@l
+ mtspr SPRN_L2CSR0,r3
+ isync
+2:
+ mfspr r3,SPRN_L2CSR0
+ andis. r1,r3,L2CSR0_L2E@h
+ beq 2b
+#endif
+
+#define EPAPR_MAGIC (0x45504150)
+#define ENTRY_ADDR_UPPER 0
+#define ENTRY_ADDR_LOWER 4
+#define ENTRY_R3_UPPER 8
+#define ENTRY_R3_LOWER 12
+#define ENTRY_RESV 16
+#define ENTRY_PIR 20
+#define ENTRY_R6_UPPER 24
+#define ENTRY_R6_LOWER 28
+#define ENTRY_SIZE 32
+
+ /* setup the entry */
+ li r3,0
+ li r8,1
+ stw r0,ENTRY_PIR(r10)
+ stw r3,ENTRY_ADDR_UPPER(r10)
+ stw r8,ENTRY_ADDR_LOWER(r10)
+ stw r3,ENTRY_R3_UPPER(r10)
+ stw r4,ENTRY_R3_LOWER(r10)
+ stw r3,ENTRY_R6_UPPER(r10)
+ stw r3,ENTRY_R6_LOWER(r10)
+
+ /* load r13 with the address of the 'bootpg' in SDRAM */
+ lis r13,toreset(__bootpg_addr)@h
+ ori r13,r13,toreset(__bootpg_addr)@l
+ lwz r13,0(r13)
+
+ /* setup mapping for AS = 1, and jump there */
+ lis r11,(MAS0_TLBSEL(1)|MAS0_ESEL(1))@h
+ mtspr SPRN_MAS0,r11
+ lis r11,(MAS1_VALID|MAS1_IPROT)@h
+ ori r11,r11,(MAS1_TS|MAS1_TSIZE(BOOKE_PAGESZ_4K))@l
+ mtspr SPRN_MAS1,r11
+ oris r11,r13,(MAS2_I|MAS2_G)@h
+ ori r11,r13,(MAS2_I|MAS2_G)@l
+ mtspr SPRN_MAS2,r11
+ oris r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@h
+ ori r11,r13,(MAS3_SX|MAS3_SW|MAS3_SR)@l
+ mtspr SPRN_MAS3,r11
+ tlbwe
+
+ bl 1f
+1: mflr r11
+ /*
+ * OR in 0xfff to create a mask of the bootpg SDRAM address. We use
+ * this mask to fixup the cpu spin table and the address that we want
+ * to jump to, eg change them from 0xfffffxxx to 0x7ffffxxx if the
+ * bootpg is at 0x7ffff000 in SDRAM.
+ */
+ ori r13,r13,0xfff
+ and r11, r11, r13
+ and r10, r10, r13
+
+ addi r11,r11,(2f-1b)
+ mfmsr r13
+ ori r12,r13,MSR_IS|MSR_DS@l
+
+ mtspr SPRN_SRR0,r11
+ mtspr SPRN_SRR1,r12
+ rfi
+
+ /* spin waiting for addr */
+2:
+ lwz r4,ENTRY_ADDR_LOWER(r10)
+ andi. r11,r4,1
+ bne 2b
+ isync
+
+ /* setup IVORs to match fixed offsets */
+#include "fixed_ivor.S"
+
+ /* get the upper bits of the addr */
+ lwz r11,ENTRY_ADDR_UPPER(r10)
+
+ /* setup branch addr */
+ mtspr SPRN_SRR0,r4
+
+ /* mark the entry as released */
+ li r8,3
+ stw r8,ENTRY_ADDR_LOWER(r10)
+
+ /* mask by ~64M to setup our tlb we will jump to */
+ rlwinm r12,r4,0,0,5
+
+ /* setup r3, r4, r5, r6, r7, r8, r9 */
+ lwz r3,ENTRY_R3_LOWER(r10)
+ li r4,0
+ li r5,0
+ lwz r6,ENTRY_R6_LOWER(r10)
+ lis r7,(64*1024*1024)@h
+ li r8,0
+ li r9,0
+
+ /* load up the pir */
+ lwz r0,ENTRY_PIR(r10)
+ mtspr SPRN_PIR,r0
+ mfspr r0,SPRN_PIR
+ stw r0,ENTRY_PIR(r10)
+
+ mtspr IVPR,r12
+/*
+ * Coming here, we know the cpu has one TLB mapping in TLB1[0]
+ * which maps 0xfffff000-0xffffffff one-to-one. We set up a
+ * second mapping that maps addr 1:1 for 64M, and then we jump to
+ * addr
+ */
+ lis r10,(MAS0_TLBSEL(1)|MAS0_ESEL(0))@h
+ mtspr SPRN_MAS0,r10
+ lis r10,(MAS1_VALID|MAS1_IPROT)@h
+ ori r10,r10,(MAS1_TSIZE(BOOKE_PAGESZ_64M))@l
+ mtspr SPRN_MAS1,r10
+ /* WIMGE = 0b00000 for now */
+ mtspr SPRN_MAS2,r12
+ ori r12,r12,(MAS3_SX|MAS3_SW|MAS3_SR)
+ mtspr SPRN_MAS3,r12
+#ifdef CONFIG_ENABLE_36BIT_PHYS
+ mtspr SPRN_MAS7,r11
+#endif
+ tlbwe
+
+/* Now we have another mapping for this page, so we jump to that
+ * mapping
+ */
+ mtspr SPRN_SRR1,r13
+ rfi
+
+ /*
+ * Allocate some space for the SDRAM address of the bootpg.
+ * This variable has to be in the boot page so that it can
+ * be accessed by secondary cores when they come out of reset.
+ */
+ .globl __bootpg_addr
+__bootpg_addr:
+ .long 0
+
+ .align L1_CACHE_SHIFT
+ .globl __spin_table
+__spin_table:
+ .space CONFIG_MAX_CPUS*ENTRY_SIZE
+
+ /* Fill in the empty space. The actual reset vector is
+ * the last word of the page */
+__secondary_start_code_end:
+ .space 4092 - (__secondary_start_code_end - __secondary_start_page)
+__secondary_reset_vector:
+ b __secondary_start_page
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