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@@ -1,14 +1,20 @@
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/*
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- * armboot - Startup Code for XScale
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+ * armboot - Startup Code for XScale CPU-core
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*
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* Copyright (C) 1998 Dan Malek <dmalek@jlc.net>
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* Copyright (C) 1999 Magnus Damm <kieraypc01.p.y.kie.era.ericsson.se>
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* Copyright (C) 2000 Wolfgang Denk <wd@denx.de>
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* Copyright (C) 2001 Alex Zuepke <azu@sysgo.de>
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+ * Copyright (C) 2001 Marius Groger <mag@sysgo.de>
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+ * Copyright (C) 2002 Alex Zupke <azu@sysgo.de>
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+ * Copyright (C) 2002 Gary Jennejohn <garyj@denx.de>
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* Copyright (C) 2002 Kyle Harris <kharris@nexus-tech.net>
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- * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>
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* Copyright (C) 2003 Kai-Uwe Bloem <kai-uwe.bloem@auerswald.de>
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- * Copyright (c) 2010 Marek Vasut <marek.vasut@gmail.com>
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+ * Copyright (C) 2003 Kshitij <kshitij@ti.com>
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+ * Copyright (C) 2003 Richard Woodruff <r-woodruff2@ti.com>
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+ * Copyright (C) 2003 Robert Schwebel <r.schwebel@pengutronix.de>
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+ * Copyright (C) 2004 Texas Instruments <r-woodruff2@ti.com>
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+ * Copyright (C) 2010 Marek Vasut <marek.vasut@gmail.com>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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@@ -32,14 +38,12 @@
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#include <asm-offsets.h>
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#include <config.h>
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#include <version.h>
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-#include <asm/arch/pxa-regs.h>
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-/* takes care the CP15 update has taken place */
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-.macro CPWAIT reg
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-mrc p15,0,\reg,c2,c0,0
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-mov \reg,\reg
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-sub pc,pc,#4
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-.endm
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+#ifdef CONFIG_CPU_PXA25X
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+#if ((CONFIG_SYS_INIT_SP_ADDR) != 0xfffff800)
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+#error "Init SP address must be set to 0xfffff800 for PXA250"
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+#endif
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+#endif
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.globl _start
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_start: b reset
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@@ -77,26 +81,38 @@ _data_abort: .word data_abort
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_not_used: .word not_used
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_irq: .word irq
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_fiq: .word fiq
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+_pad: .word 0x12345678 /* now 16*4=64 */
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#endif /* CONFIG_SPL_BUILD */
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+.global _end_vect
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+_end_vect:
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.balignl 16,0xdeadbeef
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-
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-
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/*
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+ *************************************************************************
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+ *
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* Startup Code (reset vector)
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*
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- * do important init only if we don't start from RAM!
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- * - relocate armboot to RAM
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- * - setup stack
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- * - jump to second stage
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+ * do important init only if we don't start from memory!
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+ * setup Memory and board specific bits prior to relocation.
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+ * relocate armboot to ram
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+ * setup stack
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+ *
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+ *************************************************************************
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*/
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.globl _TEXT_BASE
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_TEXT_BASE:
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+#ifdef CONFIG_SPL_BUILD
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+ .word CONFIG_SPL_TEXT_BASE
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+#else
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.word CONFIG_SYS_TEXT_BASE
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+#endif
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/*
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* These are defined in the board-specific linker script.
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+ * Subtracting _start from them lets the linker put their
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+ * relative position in the executable instead of leaving
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+ * them null.
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*/
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.globl _bss_start_ofs
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_bss_start_ofs:
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@@ -120,9 +136,8 @@ IRQ_STACK_START:
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.globl FIQ_STACK_START
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FIQ_STACK_START:
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.word 0x0badc0de
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-#endif /* CONFIG_USE_IRQ */
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+#endif
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-#ifndef CONFIG_SPL_BUILD
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/* IRQ stack memory (calculated at run-time) + 8 bytes */
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.globl IRQ_STACK_START_IN
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IRQ_STACK_START_IN:
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@@ -141,95 +156,23 @@ reset:
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orr r0,r0,#0xd3
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msr cpsr,r0
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- /*
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- * Enable MMU to use DCache as DRAM
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- */
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- /* Domain access -- enable for all CPs */
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- ldr r0, =0x0000ffff
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- mcr p15, 0, r0, c3, c0, 0
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-
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- /* Point TTBR to MMU table */
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- ldr r0, =mmu_table
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- adr r2, _start
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- orr r0, r2
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- mcr p15, 0, r0, c2, c0, 0
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-
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-/* !!! Hereby, check if the code is running from SRAM !!! */
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-/* If the code is running from SRAM, alias SRAM to 0x0 to simulate NOR. The code
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- * is linked to 0x0 too, so this makes things easier. */
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- cmp r2, #0x5c000000
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-
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- ldreq r1, [r0]
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- orreq r1, r2
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- streq r1, [r0]
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-
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- /* Kick in MMU, ICache, DCache, BTB */
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- mrc p15, 0, r0, c1, c0, 0
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- bic r0, #0x1b00
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- bic r0, #0x0087
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- orr r0, #0x1800
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- orr r0, #0x0005
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- mcr p15, 0, r0, c1, c0, 0
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- CPWAIT r0
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-
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- /* Unlock Icache, Dcache */
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- mcr p15, 0, r0, c9, c1, 1
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- mcr p15, 0, r0, c9, c2, 1
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-
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- /* Flush Icache, Dcache, BTB */
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- mcr p15, 0, r0, c7, c7, 0
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-
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- /* Unlock I-TLB, D-TLB */
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- mcr p15, 0, r0, c10, c4, 1
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- mcr p15, 0, r0, c10, c8, 1
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-
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- /* Flush TLB */
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- mcr p15, 0, r0, c8, c7, 0
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- /* Allocate 4096 bytes of Dcache as RAM */
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-
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- /* Drain pending loads and stores */
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- mcr p15, 0, r0, c7, c10, 4
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-
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- mov r4, #0x00
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- mov r5, #0x00
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- mov r2, #0x01
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- mcr p15, 0, r0, c9, c2, 0
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- CPWAIT r0
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-
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- /* 128 lines reserved (128 x 32bytes = 4096 bytes total) */
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- mov r0, #128
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- mov r1, #0xa0000000
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-alloc:
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- mcr p15, 0, r1, c7, c2, 5
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- /* Drain pending loads and stores */
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- mcr p15, 0, r0, c7, c10, 4
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- strd r4, [r1], #8
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- strd r4, [r1], #8
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- strd r4, [r1], #8
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- strd r4, [r1], #8
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- subs r0, #0x01
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- bne alloc
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- /* Drain pending loads and stores */
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- mcr p15, 0, r0, c7, c10, 4
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- mov r2, #0x00
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- mcr p15, 0, r2, c9, c2, 0
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- CPWAIT r0
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+#ifndef CONFIG_SKIP_LOWLEVEL_INIT
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+ bl cpu_init_crit
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+#endif
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- /* Jump to 0x0 ( + offset) if running from SRAM */
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- adr r0, zerojmp
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- bic r0, #0x5c000000
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- mov pc, r0
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-zerojmp:
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+#ifdef CONFIG_CPU_PXA25X
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+ bl lock_cache_for_stack
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+#endif
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/* Set stackpointer in internal RAM to call board_init_f */
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call_board_init_f:
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ldr sp, =(CONFIG_SYS_INIT_SP_ADDR)
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bic sp, sp, #7 /* 8-byte alignment for ABI compliance */
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- ldr r0,=0x00000000
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+ ldr r0, =0x00000000
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bl board_init_f
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/*------------------------------------------------------------------------------*/
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-
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+#ifndef CONFIG_SPL_BUILD
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/*
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* void relocate_code (addr_sp, gd, addr_moni)
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*
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@@ -247,6 +190,11 @@ relocate_code:
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stack_setup:
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mov sp, r4
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+/* Disable the Dcache RAM lock for stack now */
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+#ifdef CONFIG_CPU_PXA25X
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+ bl cpu_init_crit
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+#endif
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+
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adr r0, _start
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cmp r0, r6
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beq clear_bss /* skip relocation */
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@@ -254,13 +202,11 @@ stack_setup:
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ldr r3, _bss_start_ofs
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add r2, r0, r3 /* r2 <- source end address */
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- stmfd sp!, {r0-r12}
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copy_loop:
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- ldmia r0!, {r3-r5, r7-r11} /* copy from source address [r0] */
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- stmia r1!, {r3-r5, r7-r11} /* copy to target address [r1] */
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+ ldmia r0!, {r9-r10} /* copy from source address [r0] */
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+ stmia r1!, {r9-r10} /* copy to target address [r1] */
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cmp r0, r2 /* until source end address [r2] */
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blo copy_loop
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- ldmfd sp!, {r0-r12}
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#ifndef CONFIG_SPL_BUILD
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/*
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@@ -275,13 +221,13 @@ copy_loop:
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ldr r3, _rel_dyn_end_ofs /* r3 <- rel dyn end ofs */
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add r3, r3, r0 /* r3 <- rel dyn end in FLASH */
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fixloop:
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- ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */
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- add r0, r9 /* r0 <- location to fix up in RAM */
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+ ldr r0, [r2] /* r0 <- location to fix up, IN FLASH! */
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+ add r0, r0, r9 /* r0 <- location to fix up in RAM */
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ldr r1, [r2, #4]
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and r7, r1, #0xff
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- cmp r7, #23 /* relative fixup? */
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+ cmp r7, #23 /* relative fixup? */
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beq fixrel
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- cmp r7, #2 /* absolute fixup? */
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+ cmp r7, #2 /* absolute fixup? */
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beq fixabs
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/* ignore unknown type of fixup */
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b fixnext
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@@ -298,10 +244,10 @@ fixrel:
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add r1, r1, r9
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fixnext:
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str r1, [r0]
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- add r2, r2, #8 /* each rel.dyn entry is 8 bytes */
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+ add r2, r2, #8 /* each rel.dyn entry is 8 bytes */
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cmp r2, r3
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blo fixloop
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-#endif /* #ifndef CONFIG_SPL_BUILD */
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+#endif
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clear_bss:
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#ifndef CONFIG_SPL_BUILD
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@@ -322,15 +268,16 @@ clbss_l:str r2, [r0] /* clear loop... */
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* We are done. Do not return, instead branch to second part of board
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* initialization, now running from RAM.
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*/
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-#ifdef CONFIG_ONENAND_IPL
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- ldr r0, _start_oneboot_ofs
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+#ifdef CONFIG_ONENAND_SPL
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+ ldr r0, _onenand_boot_ofs
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mov pc, r0
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-_start_oneboot_ofs
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- : .word start_oneboot
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+_onenand_boot_ofs:
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+ .word onenand_boot
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#else
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+jump_2_ram:
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ldr r0, _board_init_r_ofs
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- adr r1, _start
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+ ldr r1, _TEXT_BASE
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add lr, r0, r1
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add lr, lr, r9
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/* setup parameters for board_init_r */
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@@ -341,7 +288,7 @@ _start_oneboot_ofs
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_board_init_r_ofs:
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.word board_init_r - _start
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-#endif /* CONFIG_ONENAND_IPL */
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+#endif
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_rel_dyn_start_ofs:
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.word __rel_dyn_start - _start
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@@ -349,43 +296,50 @@ _rel_dyn_end_ofs:
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.word __rel_dyn_end - _start
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_dynsym_start_ofs:
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.word __dynsym_start - _start
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-
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-#else /* CONFIG_SPL_BUILD */
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-
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-/****************************************************************************/
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-/* */
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-/* the actual reset code for OneNAND IPL */
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-/* */
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-/****************************************************************************/
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-
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-#ifndef CONFIG_PXA27X
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-#error OneNAND IPL is not supported on PXA25x and 26x due to lack of SRAM
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#endif
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+/*
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+ *************************************************************************
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+ *
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+ * CPU_init_critical registers
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+ *
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+ * setup important registers
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+ * setup memory timing
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+ *
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+ *************************************************************************
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+ */
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+#if !defined(CONFIG_SKIP_LOWLEVEL_INIT) || defined(CONFIG_CPU_PXA25X)
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+cpu_init_crit:
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+ /*
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+ * flush v4 I/D caches
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+ */
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+ mov r0, #0
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+ mcr p15, 0, r0, c7, c7, 0 /* Invalidate I+D+BTB caches */
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+ mcr p15, 0, r0, c8, c7, 0 /* Invalidate Unified TLB */
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-reset:
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- /* Set CPU to SVC32 mode */
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- mrs r0,cpsr
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- bic r0,r0,#0x1f
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- orr r0,r0,#0x13
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- msr cpsr,r0
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-
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- /* Point stack at the end of SRAM and leave 32 words for abort-stack */
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- ldr sp, =0x5c03ff80
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-
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- /* Start OneNAND IPL */
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- ldr pc, =start_oneboot
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+ /*
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+ * disable MMU stuff and caches
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+ */
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+ mrc p15, 0, r0, c1, c0, 0
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+ bic r0, r0, #0x00002300 @ clear bits 13, 9:8 (--V- --RS)
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+ bic r0, r0, #0x00000087 @ clear bits 7, 2:0 (B--- -CAM)
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+ orr r0, r0, #0x00000002 @ set bit 2 (A) Align
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+ orr r0, r0, #0x00001000 @ set bit 12 (I) I-Cache
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+ mcr p15, 0, r0, c1, c0, 0
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-#endif /* CONFIG_SPL_BUILD */
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+ mov pc, lr /* back to my caller */
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+#endif /* !CONFIG_SKIP_LOWLEVEL_INIT || CONFIG_CPU_PXA25X */
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#ifndef CONFIG_SPL_BUILD
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-/****************************************************************************/
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-/* */
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-/* Interrupt handling */
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-/* */
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-/****************************************************************************/
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-
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-/* IRQ stack frame */
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-
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+/*
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+ *************************************************************************
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+ *
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+ * Interrupt handling
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+ *
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+ *************************************************************************
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+ */
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+@
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+@ IRQ stack frame.
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+@
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#define S_FRAME_SIZE 72
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#define S_OLD_R0 68
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@@ -409,37 +363,36 @@ reset:
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#define S_R0 0
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#define MODE_SVC 0x13
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+#define I_BIT 0x80
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- /* use bad_save_user_regs for abort/prefetch/undef/swi ... */
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+/*
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+ * use bad_save_user_regs for abort/prefetch/undef/swi ...
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+ * use irq_save_user_regs / irq_restore_user_regs for IRQ/FIQ handling
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+ */
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.macro bad_save_user_regs
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- sub sp, sp, #S_FRAME_SIZE
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- stmia sp, {r0 - r12} /* Calling r0-r12 */
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- add r8, sp, #S_PC
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+ sub sp, sp, #S_FRAME_SIZE @ carve out a frame on current user stack
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+ stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
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- ldr r2, IRQ_STACK_START_IN
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- ldmia r2, {r2 - r4} /* get pc, cpsr, old_r0 */
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- add r0, sp, #S_FRAME_SIZE /* restore sp_SVC */
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+ ldr r2, IRQ_STACK_START_IN @ set base 2 words into abort stack
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+ ldmia r2, {r2 - r3} @ get values for "aborted" pc and cpsr (into parm regs)
|
|
|
+ add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack
|
|
|
|
|
|
add r5, sp, #S_SP
|
|
|
mov r1, lr
|
|
|
- stmia r5, {r0 - r4} /* save sp_SVC, lr_SVC, pc, cpsr, old_r */
|
|
|
- mov r0, sp
|
|
|
+ stmia r5, {r0 - r3} @ save sp_SVC, lr_SVC, pc, cpsr
|
|
|
+ mov r0, sp @ save current stack into r0 (param register)
|
|
|
.endm
|
|
|
|
|
|
-
|
|
|
- /* use irq_save_user_regs / irq_restore_user_regs for */
|
|
|
- /* IRQ/FIQ handling */
|
|
|
-
|
|
|
.macro irq_save_user_regs
|
|
|
sub sp, sp, #S_FRAME_SIZE
|
|
|
- stmia sp, {r0 - r12} /* Calling r0-r12 */
|
|
|
- add r8, sp, #S_PC
|
|
|
- stmdb r8, {sp, lr}^ /* Calling SP, LR */
|
|
|
- str lr, [r8, #0] /* Save calling PC */
|
|
|
+ stmia sp, {r0 - r12} @ Calling r0-r12
|
|
|
+ add r8, sp, #S_PC @ !!!! R8 NEEDS to be saved !!!! a reserved stack spot would be good.
|
|
|
+ stmdb r8, {sp, lr}^ @ Calling SP, LR
|
|
|
+ str lr, [r8, #0] @ Save calling PC
|
|
|
mrs r6, spsr
|
|
|
- str r6, [r8, #4] /* Save CPSR */
|
|
|
- str r0, [r8, #8] /* Save OLD_R0 */
|
|
|
+ str r6, [r8, #4] @ Save CPSR
|
|
|
+ str r0, [r8, #8] @ Save OLD_R0
|
|
|
mov r0, sp
|
|
|
.endm
|
|
|
|
|
@@ -452,16 +405,28 @@ reset:
|
|
|
.endm
|
|
|
|
|
|
.macro get_bad_stack
|
|
|
- ldr r13, IRQ_STACK_START_IN @ setup our mode stack
|
|
|
+ ldr r13, IRQ_STACK_START_IN @ setup our mode stack (enter in banked mode)
|
|
|
|
|
|
- str lr, [r13] @ save caller lr / spsr
|
|
|
- mrs lr, spsr
|
|
|
- str lr, [r13, #4]
|
|
|
+ str lr, [r13] @ save caller lr in position 0 of saved stack
|
|
|
+ mrs lr, spsr @ get the spsr
|
|
|
+ str lr, [r13, #4] @ save spsr in position 1 of saved stack
|
|
|
|
|
|
mov r13, #MODE_SVC @ prepare SVC-Mode
|
|
|
- msr spsr_c, r13
|
|
|
- mov lr, pc
|
|
|
- movs pc, lr
|
|
|
+ @ msr spsr_c, r13
|
|
|
+ msr spsr, r13 @ switch modes, make sure moves will execute
|
|
|
+ mov lr, pc @ capture return pc
|
|
|
+ movs pc, lr @ jump to next instruction & switch modes.
|
|
|
+ .endm
|
|
|
+
|
|
|
+ .macro get_bad_stack_swi
|
|
|
+ sub r13, r13, #4 @ space on current stack for scratch reg.
|
|
|
+ str r0, [r13] @ save R0's value.
|
|
|
+ ldr r0, IRQ_STACK_START_IN @ get data regions start
|
|
|
+ str lr, [r0] @ save caller lr in position 0 of saved stack
|
|
|
+ mrs r0, spsr @ get the spsr
|
|
|
+ str lr, [r0, #4] @ save spsr in position 1 of saved stack
|
|
|
+ ldr r0, [r13] @ restore r0
|
|
|
+ add r13, r13, #4 @ pop stack entry
|
|
|
.endm
|
|
|
|
|
|
.macro get_irq_stack @ setup IRQ stack
|
|
@@ -471,21 +436,17 @@ reset:
|
|
|
.macro get_fiq_stack @ setup FIQ stack
|
|
|
ldr sp, FIQ_STACK_START
|
|
|
.endm
|
|
|
-#endif /* CONFIG_SPL_BUILD
|
|
|
-
|
|
|
-
|
|
|
-/****************************************************************************/
|
|
|
-/* */
|
|
|
-/* exception handlers */
|
|
|
-/* */
|
|
|
-/****************************************************************************/
|
|
|
+#endif /* CONFIG_SPL_BUILD */
|
|
|
|
|
|
+/*
|
|
|
+ * exception handlers
|
|
|
+ */
|
|
|
#ifdef CONFIG_SPL_BUILD
|
|
|
.align 5
|
|
|
do_hang:
|
|
|
- ldr sp, _TEXT_BASE /* use 32 words abort stack */
|
|
|
+ ldr sp, _TEXT_BASE /* use 32 words about stack */
|
|
|
bl hang /* hang and never return */
|
|
|
-#else
|
|
|
+#else /* !CONFIG_SPL_BUILD */
|
|
|
.align 5
|
|
|
undefined_instruction:
|
|
|
get_bad_stack
|
|
@@ -494,7 +455,7 @@ undefined_instruction:
|
|
|
|
|
|
.align 5
|
|
|
software_interrupt:
|
|
|
- get_bad_stack
|
|
|
+ get_bad_stack_swi
|
|
|
bad_save_user_regs
|
|
|
bl do_software_interrupt
|
|
|
|
|
@@ -528,11 +489,12 @@ irq:
|
|
|
.align 5
|
|
|
fiq:
|
|
|
get_fiq_stack
|
|
|
- irq_save_user_regs /* someone ought to write a more */
|
|
|
- bl do_fiq /* effiction fiq_save_user_regs */
|
|
|
+ /* someone ought to write a more effiction fiq_save_user_regs */
|
|
|
+ irq_save_user_regs
|
|
|
+ bl do_fiq
|
|
|
irq_restore_user_regs
|
|
|
|
|
|
-#else /* !CONFIG_USE_IRQ */
|
|
|
+#else
|
|
|
|
|
|
.align 5
|
|
|
irq:
|
|
@@ -545,63 +507,99 @@ fiq:
|
|
|
get_bad_stack
|
|
|
bad_save_user_regs
|
|
|
bl do_fiq
|
|
|
+
|
|
|
+#endif
|
|
|
+ .align 5
|
|
|
#endif /* CONFIG_SPL_BUILD */
|
|
|
-#endif /* CONFIG_USE_IRQ */
|
|
|
|
|
|
-/****************************************************************************/
|
|
|
-/* */
|
|
|
-/* Reset function: the PXA250 doesn't have a reset function, so we have to */
|
|
|
-/* perform a watchdog timeout for a soft reset. */
|
|
|
-/* */
|
|
|
-/****************************************************************************/
|
|
|
-/* Operating System Timer */
|
|
|
-.align 5
|
|
|
-.globl reset_cpu
|
|
|
|
|
|
- /* FIXME: this code is PXA250 specific. How is this handled on */
|
|
|
- /* other XScale processors? */
|
|
|
+/*
|
|
|
+ * Enable MMU to use DCache as DRAM.
|
|
|
+ *
|
|
|
+ * This is useful on PXA25x and PXA26x in early bootstages, where there is no
|
|
|
+ * other possible memory available to hold stack.
|
|
|
+ */
|
|
|
+#ifdef CONFIG_CPU_PXA25X
|
|
|
+.macro CPWAIT reg
|
|
|
+ mrc p15, 0, \reg, c2, c0, 0
|
|
|
+ mov \reg, \reg
|
|
|
+ sub pc, pc, #4
|
|
|
+.endm
|
|
|
+lock_cache_for_stack:
|
|
|
+ /* Domain access -- enable for all CPs */
|
|
|
+ ldr r0, =0x0000ffff
|
|
|
+ mcr p15, 0, r0, c3, c0, 0
|
|
|
|
|
|
-reset_cpu:
|
|
|
+ /* Point TTBR to MMU table */
|
|
|
+ ldr r0, =mmutable
|
|
|
+ mcr p15, 0, r0, c2, c0, 0
|
|
|
|
|
|
- /* We set OWE:WME (watchdog enable) and wait until timeout happens */
|
|
|
+ /* Kick in MMU, ICache, DCache, BTB */
|
|
|
+ mrc p15, 0, r0, c1, c0, 0
|
|
|
+ bic r0, #0x1b00
|
|
|
+ bic r0, #0x0087
|
|
|
+ orr r0, #0x1800
|
|
|
+ orr r0, #0x0005
|
|
|
+ mcr p15, 0, r0, c1, c0, 0
|
|
|
+ CPWAIT r0
|
|
|
|
|
|
- ldr r0, =OWER
|
|
|
- ldr r1, [r0]
|
|
|
- orr r1, r1, #0x0001 /* bit0: WME */
|
|
|
- str r1, [r0]
|
|
|
+ /* Unlock Icache, Dcache */
|
|
|
+ mcr p15, 0, r0, c9, c1, 1
|
|
|
+ mcr p15, 0, r0, c9, c2, 1
|
|
|
|
|
|
- /* OS timer does only wrap every 1165 seconds, so we have to set */
|
|
|
- /* the match register as well. */
|
|
|
+ /* Flush Icache, Dcache, BTB */
|
|
|
+ mcr p15, 0, r0, c7, c7, 0
|
|
|
|
|
|
- ldr r0, =OSCR
|
|
|
- ldr r1, [r0] /* read OS timer */
|
|
|
- add r1, r1, #0x800 /* let OSMR3 match after */
|
|
|
- add r1, r1, #0x800 /* 4096*(1/3.6864MHz)=1ms */
|
|
|
- ldr r0, =OSMR3
|
|
|
- str r1, [r0]
|
|
|
+ /* Unlock I-TLB, D-TLB */
|
|
|
+ mcr p15, 0, r0, c10, c4, 1
|
|
|
+ mcr p15, 0, r0, c10, c8, 1
|
|
|
|
|
|
-reset_endless:
|
|
|
+ /* Flush TLB */
|
|
|
+ mcr p15, 0, r0, c8, c7, 0
|
|
|
|
|
|
- b reset_endless
|
|
|
+ /* Allocate 4096 bytes of Dcache as RAM */
|
|
|
|
|
|
-#ifndef CONFIG_SPL_BUILD
|
|
|
-.section .mmudata, "a"
|
|
|
+ /* Drain pending loads and stores */
|
|
|
+ mcr p15, 0, r0, c7, c10, 4
|
|
|
+
|
|
|
+ mov r4, #0x00
|
|
|
+ mov r5, #0x00
|
|
|
+ mov r2, #0x01
|
|
|
+ mcr p15, 0, r0, c9, c2, 0
|
|
|
+ CPWAIT r0
|
|
|
+
|
|
|
+ /* 128 lines reserved (128 x 32bytes = 4096 bytes total) */
|
|
|
+ mov r0, #128
|
|
|
+ ldr r1, =0xfffff000
|
|
|
+
|
|
|
+alloc:
|
|
|
+ mcr p15, 0, r1, c7, c2, 5
|
|
|
+ /* Drain pending loads and stores */
|
|
|
+ mcr p15, 0, r0, c7, c10, 4
|
|
|
+ strd r4, [r1], #8
|
|
|
+ strd r4, [r1], #8
|
|
|
+ strd r4, [r1], #8
|
|
|
+ strd r4, [r1], #8
|
|
|
+ subs r0, #0x01
|
|
|
+ bne alloc
|
|
|
+ /* Drain pending loads and stores */
|
|
|
+ mcr p15, 0, r0, c7, c10, 4
|
|
|
+ mov r2, #0x00
|
|
|
+ mcr p15, 0, r2, c9, c2, 0
|
|
|
+ CPWAIT r0
|
|
|
+
|
|
|
+ mov pc, lr
|
|
|
+
|
|
|
+.section .mmutable, "a"
|
|
|
+mmutable:
|
|
|
.align 14
|
|
|
- .globl mmu_table
|
|
|
-mmu_table:
|
|
|
- /* 0x00000000 - 0xa0000000 : 1:1, uncached mapping */
|
|
|
+ /* 0x00000000 - 0xffe00000 : 1:1, uncached mapping */
|
|
|
.set __base, 0
|
|
|
- .rept 0xa00
|
|
|
+ .rept 0xfff
|
|
|
.word (__base << 20) | 0xc12
|
|
|
.set __base, __base + 1
|
|
|
.endr
|
|
|
|
|
|
- /* 0xa0000000 - 0xa0100000 : 1:1, cached mapping */
|
|
|
- .word (0xa00 << 20) | 0x1c1e
|
|
|
-
|
|
|
- .set __base, 0xa01
|
|
|
- .rept 0x1000 - 0xa01
|
|
|
- .word (__base << 20) | 0xc12
|
|
|
- .set __base, __base + 1
|
|
|
- .endr
|
|
|
-#endif /* CONFIG_SPL_BUILD */
|
|
|
+ /* 0xfff00000 : 1:1, cached mapping */
|
|
|
+ .word (0xfff << 20) | 0x1c1e
|
|
|
+#endif /* CONFIG_CPU_PXA25X */
|