Signed-off-by: Luigi 'Comio' Mantellini <luigi.mantell...@idf-hit.com>
---
arch/mips/config.mk | 2 +-
arch/mips/cpu/Makefile | 28 ++-
arch/mips/cpu/cpu.c | 12 -
arch/mips/cpu/reset.c | 39 ++++
arch/mips/cpu/reset_bootstrap.c | 39 ++++
arch/mips/cpu/start_bootstrap.S | 455 +++++++++++++++++++++++++++++++++++++++
arch/mips/lib/Makefile | 15 ++-
arch/mips/lib/board_bootstrap.c | 331 ++++++++++++++++++++++++++++
8 files changed, 903 insertions(+), 18 deletions(-)
create mode 100644 arch/mips/cpu/reset.c
create mode 100644 arch/mips/cpu/reset_bootstrap.c
create mode 100644 arch/mips/cpu/start_bootstrap.S
create mode 100644 arch/mips/lib/board_bootstrap.c
diff --git a/arch/mips/config.mk b/arch/mips/config.mk
index aa06761..4655169 100644
--- a/arch/mips/config.mk
+++ b/arch/mips/config.mk
@@ -47,6 +47,6 @@ PLATFORM_CPPFLAGS += -DCONFIG_MIPS -D__MIPS__
# On the other hand, we want PIC in the U-Boot code to relocate it from ROM
# to RAM. $28 is always used as gp.
#
-PLATFORM_CPPFLAGS += -G 0 -mabicalls -fpic
+PLATFORM_CPPFLAGS += -G 0 -mabicalls -fpic -g
PLATFORM_CPPFLAGS += -msoft-float
PLATFORM_LDFLAGS += -G 0 -static -n -nostdlib
diff --git a/arch/mips/cpu/Makefile b/arch/mips/cpu/Makefile
index 06df8d1..6a9a2af 100644
--- a/arch/mips/cpu/Makefile
+++ b/arch/mips/cpu/Makefile
@@ -24,25 +24,45 @@
include $(TOPDIR)/config.mk
LIB = $(obj)lib$(CPU).o
+BOOTSTRAP_LIB = $(obj)lib$(CPU)_bootstrap.o
+
+BOOTSTRAP_LIB-$(CONFIG_BOOTSTRAP) = $(BOOTSTRAP_LIB)
START = start.o
SOBJS-y = cache.o
-COBJS-y = cpu.o interrupts.o
+COBJS-y = cpu.o reset.o interrupts.o
SOBJS-$(CONFIG_INCA_IP) += incaip_wdt.o
COBJS-$(CONFIG_INCA_IP) += asc_serial.o incaip_clock.o
+COBJS-$(CONFIG_IFX_ASC) += ifx_asc.o
COBJS-$(CONFIG_PURPLE) += asc_serial.o
COBJS-$(CONFIG_SOC_AU1X00) += au1x00_eth.o au1x00_serial.o au1x00_usb_ohci.o
-SRCS := $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
+BOOTSTRAP_START = start_bootstrap.o
+BOOTSTRAP_START-$(CONFIG_BOOTSTRAP) += $(BOOTSTRAP_START)
+BOOTSTRAP_COBJS-$(CONFIG_BOOTSTRAP) += cpu.o interrupts.o reset_bootstrap.o
+BOOTSTRAP_SOBJS-$(CONFIG_BOOTSTRAP) += cache.o
+BOOTSTRAP_COBJS-$(CONFIG_IFX_ASC) += ifx_asc.o
+
+BOOTSTRAP_OBJS := $(addprefix $(obj),$(BOOTSTRAP_SOBJS-y) $(BOOTSTRAP_COBJS-y))
+BOOTSTRAP_START := $(addprefix $(obj),$(BOOTSTRAP_START-y))
+
+SRCS := $(sort $(START:.o=.S) $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
$(BOOTSTRAP_START-y:.o=.S) $(BOOTSTRAP_SOBJS-y:.o=.S)
$(BOOTSTRAP_COBJS-y:.o=.c))
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
START := $(addprefix $(obj),$(START))
-all: $(obj).depend $(START) $(LIB)
+all: $(START) $(LIB) $(BOOTSTRAP_START-y) $(BOOTSTRAP_LIB-y)
-$(LIB): $(OBJS)
+$(START): $(obj).depend
+
+$(LIB): $(obj).depend $(OBJS)
$(call cmd_link_o_target, $(OBJS))
+$(BOOTSTRAP_START): $(obj).depend
+
+$(BOOTSTRAP_LIB): $(obj).depend $(BOOTSTRAP_OBJS)
+ $(call cmd_link_o_target, $(BOOTSTRAP_OBJS))
+
#########################################################################
# defines $(obj).depend target
diff --git a/arch/mips/cpu/cpu.c b/arch/mips/cpu/cpu.c
index 3ae397c..45bf07c 100644
--- a/arch/mips/cpu/cpu.c
+++ b/arch/mips/cpu/cpu.c
@@ -38,18 +38,6 @@
: \
: "i" (op), "R" (*(unsigned char *)(addr)))
-void __attribute__((weak)) _machine_restart(void)
-{
-}
-
-int do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
-{
- _machine_restart();
-
- fprintf(stderr, "*** reset failed ***\n");
- return 0;
-}
-
void flush_cache(ulong start_addr, ulong size)
{
unsigned long lsize = CONFIG_SYS_CACHELINE_SIZE;
diff --git a/arch/mips/cpu/reset.c b/arch/mips/cpu/reset.c
new file mode 100644
index 0000000..397fb62
--- /dev/null
+++ b/arch/mips/cpu/reset.c
@@ -0,0 +1,39 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, <w...@denx.de>
+ *
+ * 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 <common.h>
+#include <command.h>
+#include <asm/mipsregs.h>
+#include <asm/reboot.h>
+
+void __attribute__((weak)) _machine_restart(void)
+{
+}
+
+int __attribute__((weak)) do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char
* const argv[])
+{
+ _machine_restart();
+
+ fprintf(stderr, "*** reset failed ***\n");
+ return 0;
+}
diff --git a/arch/mips/cpu/reset_bootstrap.c b/arch/mips/cpu/reset_bootstrap.c
new file mode 100644
index 0000000..0bef625
--- /dev/null
+++ b/arch/mips/cpu/reset_bootstrap.c
@@ -0,0 +1,39 @@
+/*
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, <w...@denx.de>
+ *
+ * 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 <common.h>
+#include <command.h>
+#include <asm/mipsregs.h>
+#include <asm/reboot.h>
+
+void __attribute__((weak)) _machine_restart(void)
+{
+}
+
+int __attribute__((weak)) do_reset(cmd_tbl_t *cmdtp, int flag, int argc, char
* const argv[])
+{
+ _machine_restart();
+
+ printf("*** reset failed ***\n");
+ return 0;
+}
diff --git a/arch/mips/cpu/start_bootstrap.S b/arch/mips/cpu/start_bootstrap.S
new file mode 100644
index 0000000..782e473
--- /dev/null
+++ b/arch/mips/cpu/start_bootstrap.S
@@ -0,0 +1,455 @@
+/*
+ * Startup Code for MIPS32 CPU-core base on start.S source
+ *
+ * Copyright (c) 2010 Industrie Dial Face S.p.A.
+ * Luigi 'Comio' Mantellini <luigi.mantell...@idf-hit.com>
+ *
+ * Copyright (c) 2003 Wolfgang Denk <w...@denx.de>
+ *
+ * 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 <asm-offsets.h>
+#include <config.h>
+#include <asm/regdef.h>
+#include <asm/mipsregs.h>
+#include <bootstrap.h>
+
+ /*
+ * For the moment disable interrupts, mark the kernel mode and
+ * set ST0_KX so that the CPU does not spit fire when using
+ * 64-bit addresses.
+ */
+ .macro setup_c0_status set clr
+ .set push
+ mfc0 t0, CP0_STATUS
+ or t0, ST0_CU0 | \set | 0x1f | \clr
+ xor t0, 0x1f | \clr
+ mtc0 t0, CP0_STATUS
+ .set noreorder
+ sll zero, 3 # ehb
+ .set pop
+ .endm
+
+ .macro setup_c0_status_reset
+#ifdef CONFIG_64BIT
+ setup_c0_status ST0_KX 0
+#else
+ setup_c0_status 0 0
+#endif
+ .endm
+
+#define RVECENT(f,n) \
+ b f; nop
+#define XVECENT(f,bev) \
+ b f ; \
+ li k0,bev
+
+ .set noreorder
+
+ .globl _start
+ .text
+_start:
+ RVECENT(reset,0) /* U-boot entry point */
+ RVECENT(reset,1) /* software reboot */
+#if defined(CONFIG_INCA_IP)
+ .word INFINEON_EBU_BOOTCFG /* EBU init code, fetched during booting */
+ .word 0x00000000 /* phase of the flash */
+#elif defined(CONFIG_PURPLE)
+ .word INFINEON_EBU_BOOTCFG /* EBU init code, fetched during booting */
+ .word INFINEON_EBU_BOOTCFG /* EBU init code, fetched during booting */
+#else
+ RVECENT(romReserved,2)
+#endif
+ RVECENT(romReserved,3)
+ RVECENT(romReserved,4)
+ RVECENT(romReserved,5)
+ RVECENT(romReserved,6)
+ RVECENT(romReserved,7)
+ RVECENT(romReserved,8)
+ RVECENT(romReserved,9)
+ RVECENT(romReserved,10)
+ RVECENT(romReserved,11)
+ RVECENT(romReserved,12)
+ RVECENT(romReserved,13)
+ RVECENT(romReserved,14)
+ RVECENT(romReserved,15)
+ RVECENT(romReserved,16)
+ RVECENT(romReserved,17)
+ RVECENT(romReserved,18)
+ RVECENT(romReserved,19)
+ RVECENT(romReserved,20)
+ RVECENT(romReserved,21)
+ RVECENT(romReserved,22)
+ RVECENT(romReserved,23)
+ RVECENT(romReserved,24)
+ RVECENT(romReserved,25)
+ RVECENT(romReserved,26)
+ RVECENT(romReserved,27)
+ RVECENT(romReserved,28)
+ RVECENT(romReserved,29)
+ RVECENT(romReserved,30)
+ RVECENT(romReserved,31)
+ RVECENT(romReserved,32)
+ RVECENT(romReserved,33)
+ RVECENT(romReserved,34)
+ RVECENT(romReserved,35)
+ RVECENT(romReserved,36)
+ RVECENT(romReserved,37)
+ RVECENT(romReserved,38)
+ RVECENT(romReserved,39)
+ RVECENT(romReserved,40)
+ RVECENT(romReserved,41)
+ RVECENT(romReserved,42)
+ RVECENT(romReserved,43)
+ RVECENT(romReserved,44)
+ RVECENT(romReserved,45)
+ RVECENT(romReserved,46)
+ RVECENT(romReserved,47)
+ RVECENT(romReserved,48)
+ RVECENT(romReserved,49)
+ RVECENT(romReserved,50)
+ RVECENT(romReserved,51)
+ RVECENT(romReserved,52)
+ RVECENT(romReserved,53)
+ RVECENT(romReserved,54)
+ RVECENT(romReserved,55)
+ RVECENT(romReserved,56)
+ RVECENT(romReserved,57)
+ RVECENT(romReserved,58)
+ RVECENT(romReserved,59)
+ RVECENT(romReserved,60)
+ RVECENT(romReserved,61)
+ RVECENT(romReserved,62)
+ RVECENT(romReserved,63)
+ XVECENT(romExcHandle,0x200) /* bfc00200: R4000 tlbmiss vector */
+ RVECENT(romReserved,65)
+ RVECENT(romReserved,66)
+ RVECENT(romReserved,67)
+ RVECENT(romReserved,68)
+ RVECENT(romReserved,69)
+ RVECENT(romReserved,70)
+ RVECENT(romReserved,71)
+ RVECENT(romReserved,72)
+ RVECENT(romReserved,73)
+ RVECENT(romReserved,74)
+ RVECENT(romReserved,75)
+ RVECENT(romReserved,76)
+ RVECENT(romReserved,77)
+ RVECENT(romReserved,78)
+ RVECENT(romReserved,79)
+ XVECENT(romExcHandle,0x280) /* bfc00280: R4000 xtlbmiss vector */
+ RVECENT(romReserved,81)
+ RVECENT(romReserved,82)
+ RVECENT(romReserved,83)
+ RVECENT(romReserved,84)
+ RVECENT(romReserved,85)
+ RVECENT(romReserved,86)
+ RVECENT(romReserved,87)
+ RVECENT(romReserved,88)
+ RVECENT(romReserved,89)
+ RVECENT(romReserved,90)
+ RVECENT(romReserved,91)
+ RVECENT(romReserved,92)
+ RVECENT(romReserved,93)
+ RVECENT(romReserved,94)
+ RVECENT(romReserved,95)
+ XVECENT(romExcHandle,0x300) /* bfc00300: R4000 cache vector */
+ RVECENT(romReserved,97)
+ RVECENT(romReserved,98)
+ RVECENT(romReserved,99)
+ RVECENT(romReserved,100)
+ RVECENT(romReserved,101)
+ RVECENT(romReserved,102)
+ RVECENT(romReserved,103)
+ RVECENT(romReserved,104)
+ RVECENT(romReserved,105)
+ RVECENT(romReserved,106)
+ RVECENT(romReserved,107)
+ RVECENT(romReserved,108)
+ RVECENT(romReserved,109)
+ RVECENT(romReserved,110)
+ RVECENT(romReserved,111)
+ XVECENT(romExcHandle,0x380) /* bfc00380: R4000 general vector */
+ RVECENT(romReserved,113)
+ RVECENT(romReserved,114)
+ RVECENT(romReserved,115)
+ RVECENT(romReserved,116)
+ RVECENT(romReserved,116)
+ RVECENT(romReserved,118)
+ RVECENT(romReserved,119)
+ RVECENT(romReserved,120)
+ RVECENT(romReserved,121)
+ RVECENT(romReserved,122)
+ RVECENT(romReserved,123)
+ RVECENT(romReserved,124)
+ RVECENT(romReserved,125)
+ RVECENT(romReserved,126)
+ RVECENT(romReserved,127)
+
+ /* We hope there are no more reserved vectors!
+ * 128 * 8 == 1024 == 0x400
+ * so this is address R_VEC+0x400 == 0xbfc00400
+ */
+#ifdef CONFIG_PURPLE
+/* 0xbfc00400 */
+ .word 0xdc870000
+ .word 0xfca70000
+ .word 0x20840008
+ .word 0x20a50008
+ .word 0x20c6ffff
+ .word 0x14c0fffa
+ .word 0x00000000
+ .word 0x03e00008
+ .word 0x00000000
+ .word 0x00000000
+/* 0xbfc00428 */
+ .word 0xdc870000
+ .word 0xfca70000
+ .word 0x20840008
+ .word 0x20a50008
+ .word 0x20c6ffff
+ .word 0x14c0fffa
+ .word 0x00000000
+ .word 0x03e00008
+ .word 0x00000000
+ .word 0x00000000
+#endif /* CONFIG_PURPLE */
+ .align 4
+reset:
+
+ /* Clear watch registers.
+ */
+ mtc0 zero, CP0_WATCHLO
+ mtc0 zero, CP0_WATCHHI
+
+ /* WP(Watch Pending), SW0/1 should be cleared. */
+ mtc0 zero, CP0_CAUSE
+
+ setup_c0_status_reset
+
+ /* Init Timer */
+ mtc0 zero, CP0_COUNT
+ mtc0 zero, CP0_COMPARE
+
+#if !defined(CONFIG_BOOTSTRAP_SKIP_LOWLEVEL_INIT)
+ /* CONFIG0 register */
+ li t0, CONF_CM_UNCACHED
+ mtc0 t0, CP0_CONFIG
+#endif /* !CONFIG_SKIP_LOWLEVEL_INIT */
+
+ /* Initialize $gp.
+ */
+ bal 1f
+ nop
+ .word _gp
+1:
+ lw gp, 0(ra)
+
+#if !defined(CONFIG_BOOTSTRAP_SKIP_LOWLEVEL_INIT)
+ /* Initialize any external memory.
+ */
+ la t9, lowlevel_init
+ jalr t9
+ nop
+
+ /* Initialize caches...
+ */
+ la t9, mips_cache_reset
+ jalr t9
+ nop
+
+ /* ... and enable them.
+ */
+ li t0, CONF_CM_CACHABLE_NONCOHERENT
+ mtc0 t0, CP0_CONFIG
+#endif /* !CONFIG_SKIP_LOWLEVEL_INIT */
+
+ /* Set up temporary stack.
+ */
+#ifdef CONFIG_SYS_INIT_RAM_LOCK_MIPS
+ li a0, CONFIG_SYS_INIT_SP_OFFSET
+ la t9, mips_cache_lock
+ jalr t9
+ nop
+#endif
+
+ li t0, CONFIG_SYS_SDRAM_BASE + CONFIG_SYS_INIT_SP_OFFSET
+ la sp, 0(t0)
+
+ la t9, bootstrap_board_init_f
+ jr t9
+ nop
+
+#if defined(_CONFIG_BOOTSTRAP_RELOCATE)
+/*
+ * void relocate_code (addr_sp, gd, addr_moni)
+ *
+ * This "function" does not return, instead it continues in RAM
+ * after relocating the monitor code.
+ *
+ * a0 = addr_sp
+ * a1 = gd
+ * a2 = destination address
+ */
+ .globl relocate_code
+ .ent relocate_code
+relocate_code:
+ move sp, a0 /* Set new stack pointer */
+
+ li t0, CONFIG_BOOTSTRAP_TEXT_BASE
+ la t3, in_ram
+ lw t2, -12(t3) /* t2 <-- uboot_end_data */
+ move t1, a2
+ move s2, a2 /* s2 <-- destination address */
+
+ /*
+ * Fix $gp:
+ *
+ * New $gp = (Old $gp - CONFIG_SYS_MONITOR_BASE) + Destination Address
+ */
+ move t6, gp
+ sub gp, CONFIG_BOOTSTRAP_TEXT_BASE
+ add gp, a2 /* gp now adjusted */
+ sub s1, gp, t6 /* s1 <-- relocation offset */
+
+ /*
+ * t0 = source address
+ * t1 = target address
+ * t2 = source end address
+ */
+
+ /*
+ * Save destination address and size for later usage in flush_cache()
+ */
+ move s0, a1 /* save gd in s0 */
+ move a0, t1 /* a0 <-- destination addr */
+ sub a1, t2, t0 /* a1 <-- size */
+
+ /* On the purple board we copy the code earlier in a special way
+ * in order to solve flash problems
+ */
+#ifndef CONFIG_PURPLE
+1:
+ lw t3, 0(t0)
+ sw t3, 0(t1)
+ addu t0, 4
+ ble t0, t2, 1b
+ addu t1, 4 /* delay slot */
+#endif
+
+ /* If caches were enabled, we would have to flush them here.
+ */
+
+ /* a0 & a1 are already set up for flush_cache(start, size) */
+ la t9, flush_cache
+ jalr t9
+ nop
+
+ /* Jump to where we've relocated ourselves.
+ */
+ addi t0, s2, in_ram - _start
+ jr t0
+ nop
+
+ .word _gp
+ .word _GLOBAL_OFFSET_TABLE_
+ .word uboot_end_data
+ .word uboot_end
+ .word num_got_entries
+
+in_ram:
+ /*
+ * Now we want to update GOT.
+ *
+ * GOT[0] is reserved. GOT[1] is also reserved for the dynamic object
+ * generated by GNU ld. Skip these reserved entries from relocation.
+ */
+ lw t3, -4(t0) /* t3 <-- num_got_entries */
+ lw t4, -16(t0) /* t4 <-- _GLOBAL_OFFSET_TABLE_ */
+ lw t5, -20(t0) /* t5 <-- _gp */
+ sub t4, t5 /* compute offset*/
+ add t4, t4, gp /* t4 now holds relocated _GLOBAL_OFFSET_TABLE_
*/
+ addi t4, t4, 8 /* Skipping first two entries. */
+ li t2, 2
+1:
+ lw t1, 0(t4)
+ beqz t1, 2f
+ add t1, s1
+ sw t1, 0(t4)
+2:
+ addi t2, 1
+ blt t2, t3, 1b
+ addi t4, 4 /* delay slot */
+
+ /* Clear BSS.
+ */
+ lw t1, -12(t0) /* t1 <-- uboot_end_data */
+ lw t2, -8(t0) /* t2 <-- uboot_end */
+ add t1, s1 /* adjust pointers */
+ add t2, s1
+
+ sub t1, 4
+1:
+ addi t1, 4
+ bltl t1, t2, 1b
+ sw zero, 0(t1) /* delay slot */
+
+ move a0, s0 /* a0 <-- gd */
+ la t9, bootstrap_board_init_r
+ jr t9
+ move a1, s2 /* delay slot */
+
+ .end relocate_code
+#endif
+
+/*
+ * void copy_and_jump (void)
+ *
+ * This function copies/unzips the u-boot image and runs it.
+ * This "function" does not return
+ *
+*/
+ .globl copy_and_jump
+ .ent copy_and_jump
+copy_and_jump:
+
+ /* copy_uboot(CONFIG_SYS_MONITOR_BASE, payload_uncsize, payload_start,
payload_size) */
+ li a0, CONFIG_SYS_MONITOR_BASE
+ la a1, payload_uncsize
+ lw a1, 0(a1)
+ la a2, payload_start
+ la a3, payload_size
+ la t9, copy_uboot
+ jalr t9
+ lw a3, 0(a3) /* delay slot */
+
+ li t9, CONFIG_SYS_MONITOR_BASE
+ jr t9
+ nop
+
+ .end copy_and_jump
+
+ /* Exception handlers.
+ */
+romReserved:
+ b romReserved
+
+romExcHandle:
+ b romExcHandle
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 4e90704..3570581 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -24,6 +24,9 @@
include $(TOPDIR)/config.mk
LIB = $(obj)lib$(ARCH).o
+BOOTSTRAP_LIB = $(obj)lib$(ARCH)_bootstrap.o
+
+BOOTSTRAP_LIB-$(CONFIG_BOOTSTRAP) = $(BOOTSTRAP_LIB)
SOBJS-y +=
@@ -35,12 +38,22 @@ COBJS-y += bootm.o
endif
COBJS-y += time.o
-SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c)
+BOOTSTRAP_COBJS-$(CONFIG_BOOTSTRAP) += board_bootstrap.o
+BOOTSTRAP_COBJS-$(CONFIG_BOOTSTRAP) += time.o
+
+BOOTSTRAP_OBJS := $(addprefix $(obj),$(BOOTSTRAP_SOBJS-y) $(BOOTSTRAP_COBJS-y))
+
+SRCS := $(SOBJS-y:.o=.S) $(COBJS-y:.o=.c) $(BOOTSTRAP_SOBJS-y:.o=.S)
$(BOOTSTRAP_COBJS-y:.o=.c)
OBJS := $(addprefix $(obj),$(SOBJS-y) $(COBJS-y))
+all: $(LIB) $(BOOTSTRAP_LIB-y)
+
$(LIB): $(obj).depend $(OBJS)
$(call cmd_link_o_target, $(OBJS))
+$(BOOTSTRAP_LIB): $(obj).depend $(BOOTSTRAP_OBJS)
+ $(call cmd_link_o_target, $(BOOTSTRAP_OBJS))
+
#########################################################################
# defines $(obj).depend target
diff --git a/arch/mips/lib/board_bootstrap.c b/arch/mips/lib/board_bootstrap.c
new file mode 100644
index 0000000..8c1b205
--- /dev/null
+++ b/arch/mips/lib/board_bootstrap.c
@@ -0,0 +1,331 @@
+/*
+ * (C) Copyright 2010 Industrie Dial Face S.p.A.
+ * Luigi 'Comio' Mantellini, luigi.mantell...@idf-hit.com
+ *
+ * (C) Copyright 2003
+ * Wolfgang Denk, DENX Software Engineering, w...@denx.de.
+ *
+ * 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 <common.h>
+#include <bootstrap.h>
+#include <malloc.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern int timer_init(void);
+
+extern int incaip_set_cpuclk(void);
+
+extern ulong uboot_end_data;
+extern ulong uboot_end;
+
+extern void copy_and_jump(void);
+
+static char *failed = "*** failed ***\n";
+
+/*
+ * mips_io_port_base is the begin of the address space to which x86 style
+ * I/O ports are mapped.
+ */
+unsigned long mips_io_port_base = -1;
+
+int __board_early_init_f(void)
+{
+ /*
+ * Nothing to do in this dummy implementation
+ */
+ return 0;
+}
+
+#if defined(_CONFIG_BOOTSTRAP_FAKEMALLOC)
+static void fake_malloc_init(void)
+{
+ ulong addr;
+ void *ptr;
+ uint *status;
+ uint *count;
+
+ addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
+ addr &= ~(4096 - 1);
+ addr -= TOTAL_MALLOC_LEN;
+
+ status = (void *)addr;
+ count = (void *)(addr + sizeof(uint));
+
+ *status = addr + 16;
+ *count = 0;
+
+ debug ("Init fake memory manager @%08lx total %d\n", addr,
TOTAL_MALLOC_LEN - 16);
+}
+
+static void *__fake_malloc(size_t n)
+{
+ ulong addr;
+ void *ptr;
+ uint *status;
+ uint *count;
+
+ addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
+ addr &= ~(4096 - 1);
+ addr -= TOTAL_MALLOC_LEN;
+
+ status = (uint *)addr;
+ count = (uint *)(addr + sizeof(uint));
+ ptr = (void *)(*status);
+
+ if (!ptr || *count + n> (TOTAL_MALLOC_LEN - 16)) {
+ /* Memory already used */
+ debug ("No enough memory\n");
+
+ return NULL;
+ }
+
+ *count += n;
+ *status += n;
+
+ debug ("Allocate memory @%08lx / %d (available %d)\n", (ulong)ptr, n,
TOTAL_MALLOC_LEN - 16 - *count);
+
+ return ptr;
+}
+
+static void __fake_free(void *ptr)
+{
+ debug ("Free memory @%08lx\n", (ulong)ptr);
+
+ return;
+}
+
+void *malloc(size_t) __attribute__((weak, alias("__fake_malloc")));
+void free(void *) __attribute__((weak, alias("__fake_free")));
+#endif
+
+int board_early_init_f(void) __attribute__((weak,
alias("__board_early_init_f")));
+int bootstrap_board_early_init_f(void) __attribute__((weak,
alias("board_early_init_f")));
+
+static int bootstrap_init_func_ram (void)
+{
+ if ((gd->ram_size = bootstrap_initdram (0)) > 0) {
+ return (0);
+ }
+ puts (failed);
+ return (1);
+}
+
+static int bootstrap_display_banner(void)
+{
+ puts ("bootstrap...");
+ return (0);
+}
+
+static int bootstrap_init_baudrate (void)
+{
+#if defined(CONFIG_BOOTSTRAP_BAUDRATE)
+ gd->baudrate = CONFIG_BOOTSTRAP_BAUDRATE;
+#else
+ gd->baudrate = CONFIG_BAUDRATE;
+#endif
+ return 0;
+}
+
+/*
+ * Breath some life into the board...
+ *
+ * The first part of initialization is running from Flash memory;
+ * its main purpose is to initialize the RAM so that we
+ * can relocate the monitor code to RAM.
+ */
+
+/*
+ * All attempts to come up with a "common" initialization sequence
+ * that works for all boards and architectures failed: some of the
+ * requirements are just _too_ different. To get rid of the resulting
+ * mess of board dependend #ifdef'ed code we now make the whole
+ * initialization sequence configurable to the user.
+ *
+ * The requirements for any new initalization function is simple: it
+ * receives a pointer to the "global data" structure as it's only
+ * argument, and returns an integer return code, where 0 means
+ * "continue" and != 0 means "fatal error, hang the system".
+ */
+typedef int (init_fnc_t) (void);
+
+static init_fnc_t *init_sequence[] = {
+ bootstrap_board_early_init_f,
+ timer_init,
+ bootstrap_init_baudrate,/* initialze baudrate settings */
+ serial_init, /* serial communications setup */
+ bootstrap_display_banner, /* say that we are here */
+ bootstrap_checkboard,
+ bootstrap_init_func_ram,
+ NULL,
+};
+
+
+void bootstrap_board_init_f(ulong bootflag)
+{
+ gd_t gd_data, *id;
+ bd_t *bd;
+ init_fnc_t **init_fnc_ptr;
+ ulong addr, addr_sp, len = (ulong)&uboot_end -
CONFIG_BOOTSTRAP_TEXT_BASE;
+ ulong *s;
+
+ /* Pointer is writable since we allocated a register for it.
+ */
+ gd = &gd_data;
+ /* compiler optimization barrier needed for GCC >= 3.4 */
+ __asm__ __volatile__("": : :"memory");
+
+ memset ((void *)gd, 0, sizeof (gd_t));
+
+ for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
+ if ((*init_fnc_ptr)() != 0) {
+ bootstrap_hang ();
+ }
+ }
+
+ /*
+ * Now that we have DRAM mapped and working, we can
+ * relocate the code and continue running from DRAM.
+ */
+ addr = CONFIG_SYS_SDRAM_BASE + gd->ram_size;
+
+ /* We can reserve some RAM "on top" here.
+ */
+
+ /* round down to next 4 kB limit.
+ */
+ addr &= ~(4096 - 1);
+ debug ("Top of RAM usable for U-Boot at: %08lx\n", addr);
+
+#if defined(_CONFIG_BOOTSTRAP_RELOCATE)
+ /* Reserve memory for U-Boot code, data & bss
+ * round down to next 16 kB limit
+ */
+ addr -= len;
+ addr &= ~(16 * 1024 - 1);
+
+ debug ("Reserving %ldk for U-Boot at: %08lx\n", len >> 10, addr);
+#endif
+
+#if defined(_CONFIG_BOOTSTRAP_MALLOC)
+ /* Reserve memory for malloc() arena.
+ */
+ addr_sp = addr - TOTAL_MALLOC_LEN;
+ debug ("Reserving %dk for malloc() at: %08lx\n",
+ TOTAL_MALLOC_LEN >> 10, addr_sp);
+#else
+ addr_sp = addr;
+#endif
+
+#if defined(_CONFIG_BOOTSTRAP_FAKEMALLOC)
+ fake_malloc_init();
+#endif
+
+ /*
+ * (permanently) allocate a Board Info struct
+ * and a permanent copy of the "global" data
+ */
+ addr_sp -= sizeof(bd_t);
+ bd = (bd_t *)addr_sp;
+ gd->bd = bd;
+ debug ("Reserving %zu Bytes for Board Info at: %08lx\n",
+ sizeof(bd_t), addr_sp);
+
+ addr_sp -= sizeof(gd_t);
+ id = (gd_t *)addr_sp;
+ debug ("Reserving %zu Bytes for Global Data at: %08lx\n",
+ sizeof (gd_t), addr_sp);
+
+ /*
+ * Finally, we set up a new (bigger) stack.
+ *
+ * Leave some safety gap for SP, force alignment on 16 byte boundary
+ * Clear initial stack frame
+ */
+ addr_sp -= 16;
+ addr_sp &= ~0xF;
+ s = (ulong *)addr_sp;
+ *s-- = 0;
+ *s-- = 0;
+ addr_sp = (ulong)s;
+ debug ("Stack Pointer at: %08lx\n", addr_sp);
+
+ /*
+ * Save local variables to board info struct
+ */
+ bd->bi_memstart = CONFIG_SYS_SDRAM_BASE; /* start of DRAM
memory */
+ bd->bi_memsize = gd->ram_size; /* size of DRAM memory in
bytes */
+ bd->bi_baudrate = gd->baudrate; /* Console Baudrate */
+
+ memcpy (id, (void *)gd, sizeof (gd_t));
+
+#if defined(_CONFIG_BOOTSTRAP_RELOCATE)
+ relocate_code (addr_sp, id, addr);
+#else
+ copy_and_jump();
+#endif
+
+ /* NOTREACHED - relocate_code() does not return */
+}
+/************************************************************************
+ *
+ * This is the next part if the initialization sequence: we are now
+ * running from RAM and have a "normal" C environment, i. e. global
+ * data can be written, BSS has been cleared, the stack size in not
+ * that critical any more, etc.
+ *
+ ************************************************************************
+ */
+
+#if defined(_CONFIG_BOOTSTRAP_RELOCATE)
+void bootstrap_board_init_r (gd_t *id, ulong dest_addr)
+{
+ extern void malloc_bin_reloc (void);
+
+ bd_t *bd;
+
+ gd = id;
+ gd->flags |= GD_FLG_RELOC; /* tell others: relocation done */
+
+ debug ("Now running in RAM - U-Boot at: %08lx\n", dest_addr);
+
+ gd->reloc_off = dest_addr - CONFIG_BOOTSTRAP_TEXT_BASE;
+
+ bd = gd->bd;
+
+#if defined(_CONFIG_BOOTSTRAP_MALLOC) && !defined(_CONFIG_BOOTSTRAP_FAKEMALLOC)
+ /* The Malloc area is immediately below the monitor copy in DRAM */
+ mem_malloc_init(CONFIG_BOOTSTRAP_TEXT_BASE + gd->reloc_off -
+ TOTAL_MALLOC_LEN, TOTAL_MALLOC_LEN);
+ malloc_bin_reloc();
+#endif
+
+ copy_and_jump();
+
+ /* NOTREACHED - no way out of command loop except booting */
+}
+#endif
+
+void bootstrap_hang (void)
+{
+ puts ("### ERROR ### Please RESET the board ###\n");
+ for (;;);
+}
--
1.7.3
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