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authorSascha Hauer <s.hauer@pengutronix.de>2019-05-10 18:15:50 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2019-05-10 18:15:50 +0200
commit65cfdbebb19f0b1c8d322a3eb9ec464d669a4d3f (patch)
treec279915875be7850298cfe1ccd3b96c149373590
parente7dad8c88a19e7130b4241bfe1f251620850ce4b (diff)
parent113c2bc244649430200bf51df7ffd122fd260c24 (diff)
downloadbarebox-65cfdbebb19f0b1c8d322a3eb9ec464d669a4d3f.tar.gz
Merge branch 'for-next/mips'
-rw-r--r--arch/mips/Kconfig19
-rw-r--r--arch/mips/Makefile9
-rw-r--r--arch/mips/boards/8devices-lima/lowlevel.S3
-rw-r--r--arch/mips/boards/black-swift/lowlevel.S3
-rw-r--r--arch/mips/boards/dlink-dir-320/lowlevel.S3
-rw-r--r--arch/mips/boards/dptechnics-dpt-module/lowlevel.S3
-rw-r--r--arch/mips/boards/img-ci20/lowlevel.S3
-rw-r--r--arch/mips/boards/loongson-ls1b/lowlevel.S3
-rw-r--r--arch/mips/boards/qemu-malta/lowlevel.S3
-rw-r--r--arch/mips/boards/ritmix-rzx50/lowlevel.S3
-rw-r--r--arch/mips/boards/tplink-mr3020/lowlevel.S3
-rw-r--r--arch/mips/boards/tplink-wdr4300/lowlevel.S3
-rw-r--r--arch/mips/boot/dtb.c4
-rw-r--r--arch/mips/boot/main_entry-pbl.c13
-rw-r--r--arch/mips/boot/main_entry.c17
-rw-r--r--arch/mips/boot/start.S4
-rw-r--r--arch/mips/include/asm/asm.h3
-rw-r--r--arch/mips/include/asm/pbl_macros.h4
-rw-r--r--arch/mips/include/asm/relocs.h23
-rw-r--r--arch/mips/include/asm/sections.h14
-rw-r--r--arch/mips/lib/Makefile2
-rw-r--r--arch/mips/lib/barebox.lds.S27
-rw-r--r--arch/mips/lib/cpu-probe.c14
-rw-r--r--arch/mips/lib/pbl.lds.S13
-rw-r--r--arch/mips/lib/reloc.c182
-rw-r--r--arch/mips/lib/sections.c9
-rw-r--r--scripts/Makefile1
-rw-r--r--scripts/mips-relocs.c426
28 files changed, 778 insertions, 36 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a4070cf..5901930 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -7,7 +7,6 @@ config MIPS
select GENERIC_LIB_ASHRDI3
select GENERIC_LIB_LSHRDI3
select HAS_KALLSYMS
- select HAVE_CONFIGURABLE_MEMORY_LAYOUT
select HAVE_CONFIGURABLE_TEXT_BASE
select HAVE_PBL_MULTI_IMAGES
select HAS_DMA
@@ -32,6 +31,24 @@ config PHYS_ADDR_T_64BIT
menu "Machine selection"
+config MIPS_RELOCATION_TABLE_SIZE
+ hex "Relocation table size"
+ range 0x100 0x10000
+ default "0x8000"
+ ---help---
+ A table of relocation data will be appended to the Barebox binary
+ and parsed in relocate_code() to fix up all offsets in the relocated
+ Barebox.
+
+ This option allows the amount of space reserved for the table to be
+ adjusted in a range from 256 up to 64k. The default is 32k and should
+ be ok in most cases. Reduce this value to shrink the size of U-Boot
+ binary.
+
+ The build will fail and a valid size suggested if this is too small.
+
+ If unsure, leave at the default value.
+
config BUILTIN_DTB
bool "link a DTB into the barebox image"
depends on OFTREE
diff --git a/arch/mips/Makefile b/arch/mips/Makefile
index 5fbd51c..6f1a1ce 100644
--- a/arch/mips/Makefile
+++ b/arch/mips/Makefile
@@ -59,7 +59,7 @@ CPPFLAGS += -DTEXT_BASE=$(CONFIG_TEXT_BASE)
ifndef CONFIG_MODULES
# Add cleanup flags
CPPFLAGS += -fdata-sections -ffunction-sections
-LDFLAGS_barebox += -static --gc-sections
+LDFLAGS_barebox += -static --gc-sections --emit-relocs
endif
ifdef CONFIG_IMAGE_COMPRESSION
@@ -116,6 +116,13 @@ CFLAGS += $(cflags-y)
lds-$(CONFIG_GENERIC_LINKER_SCRIPT) := arch/mips/lib/barebox.lds
+cmd_barebox__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_barebox) -o $@ \
+ -T $(barebox-lds) \
+ --start-group $(barebox-common) --end-group \
+ $(filter-out $(barebox-lds) $(barebox-common) FORCE ,$^); \
+ $(objtree)/scripts/mips-relocs $@
+
+
CLEAN_FILES += arch/mips/lib/barebox.lds barebox.map barebox.S
pbl := arch/mips/pbl
diff --git a/arch/mips/boards/8devices-lima/lowlevel.S b/arch/mips/boards/8devices-lima/lowlevel.S
index b53b23b..dd1ab62 100644
--- a/arch/mips/boards/8devices-lima/lowlevel.S
+++ b/arch/mips/boards/8devices-lima/lowlevel.S
@@ -11,6 +11,7 @@
#include <mach/pbl_macros.h>
#include <mach/pbl_ll_init_qca4531.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
@@ -38,4 +39,4 @@ skip_flash_test:
dcache_enable
skip_pll_ram_config:
-ENTRY_FUNCTION_END(BOARD_PBL_START, qca4531_8devices_lima)
+ENTRY_FUNCTION_END(BOARD_PBL_START, qca4531_8devices_lima, SZ_64M)
diff --git a/arch/mips/boards/black-swift/lowlevel.S b/arch/mips/boards/black-swift/lowlevel.S
index 0ba7743..5c5afcd 100644
--- a/arch/mips/boards/black-swift/lowlevel.S
+++ b/arch/mips/boards/black-swift/lowlevel.S
@@ -11,9 +11,10 @@
#include <asm/asm.h>
#include <mach/pbl_macros.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
ar9331_pbl_generic_start
-ENTRY_FUNCTION_END(BOARD_PBL_START, black_swift)
+ENTRY_FUNCTION_END(BOARD_PBL_START, black_swift, SZ_64M)
diff --git a/arch/mips/boards/dlink-dir-320/lowlevel.S b/arch/mips/boards/dlink-dir-320/lowlevel.S
index 9f3bd5d..da969bc 100644
--- a/arch/mips/boards/dlink-dir-320/lowlevel.S
+++ b/arch/mips/boards/dlink-dir-320/lowlevel.S
@@ -9,6 +9,7 @@
#include <asm/pbl_macros.h>
#include <mach/debug_ll.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
@@ -19,4 +20,4 @@ ENTRY_FUNCTION(BOARD_PBL_START)
/* CPU/SoC specific setup ... */
/* ... absent */
-ENTRY_FUNCTION_END(BOARD_PBL_START, dlink_dir_320)
+ENTRY_FUNCTION_END(BOARD_PBL_START, dlink_dir_320, SZ_32M)
diff --git a/arch/mips/boards/dptechnics-dpt-module/lowlevel.S b/arch/mips/boards/dptechnics-dpt-module/lowlevel.S
index 28b8f4f..b562196 100644
--- a/arch/mips/boards/dptechnics-dpt-module/lowlevel.S
+++ b/arch/mips/boards/dptechnics-dpt-module/lowlevel.S
@@ -12,9 +12,10 @@
#include <asm/pbl_macros.h>
#include <mach/pbl_macros.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
ar9331_pbl_generic_start
-ENTRY_FUNCTION_END(BOARD_PBL_START, ar9331_dptechnics_dpt_module)
+ENTRY_FUNCTION_END(BOARD_PBL_START, ar9331_dptechnics_dpt_module, SZ_64M)
diff --git a/arch/mips/boards/img-ci20/lowlevel.S b/arch/mips/boards/img-ci20/lowlevel.S
index 056df17..0295e44 100644
--- a/arch/mips/boards/img-ci20/lowlevel.S
+++ b/arch/mips/boards/img-ci20/lowlevel.S
@@ -10,6 +10,7 @@
#include <asm/pbl_macros.h>
#include <mach/debug_ll.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
@@ -23,4 +24,4 @@ ENTRY_FUNCTION(BOARD_PBL_START)
debug_ll_outc '.'
debug_ll_ns16550_outnl
-ENTRY_FUNCTION_END(BOARD_PBL_START, img_ci20)
+ENTRY_FUNCTION_END(BOARD_PBL_START, img_ci20, SZ_1G)
diff --git a/arch/mips/boards/loongson-ls1b/lowlevel.S b/arch/mips/boards/loongson-ls1b/lowlevel.S
index 37744e9..c533df3 100644
--- a/arch/mips/boards/loongson-ls1b/lowlevel.S
+++ b/arch/mips/boards/loongson-ls1b/lowlevel.S
@@ -9,6 +9,7 @@
#include <mach/loongson1.h>
#include <mach/debug_ll.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
@@ -21,4 +22,4 @@ ENTRY_FUNCTION(BOARD_PBL_START)
debug_ll_outc '.'
debug_ll_ns16550_outnl
-ENTRY_FUNCTION_END(BOARD_PBL_START, loongson_ls1b)
+ENTRY_FUNCTION_END(BOARD_PBL_START, loongson_ls1b, SZ_64M)
diff --git a/arch/mips/boards/qemu-malta/lowlevel.S b/arch/mips/boards/qemu-malta/lowlevel.S
index 3861ae9..e4ecde4 100644
--- a/arch/mips/boards/qemu-malta/lowlevel.S
+++ b/arch/mips/boards/qemu-malta/lowlevel.S
@@ -10,6 +10,7 @@
#include <asm/asm.h>
#include <asm/pbl_macros.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
#include <asm/addrspace.h>
#include <asm/gt64120.h>
@@ -82,4 +83,4 @@ __start:
li t0, GT_LD(0x1bdfffff)
sw t0, GT_PCI0M1HD_OFS(t1)
-ENTRY_FUNCTION_END(BOARD_PBL_START, qemu_malta)
+ENTRY_FUNCTION_END(BOARD_PBL_START, qemu_malta, SZ_256M)
diff --git a/arch/mips/boards/ritmix-rzx50/lowlevel.S b/arch/mips/boards/ritmix-rzx50/lowlevel.S
index 7a97438..33810f6 100644
--- a/arch/mips/boards/ritmix-rzx50/lowlevel.S
+++ b/arch/mips/boards/ritmix-rzx50/lowlevel.S
@@ -10,6 +10,7 @@
#include <asm/pbl_macros.h>
#include <mach/debug_ll.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
@@ -23,4 +24,4 @@ ENTRY_FUNCTION(BOARD_PBL_START)
debug_ll_outc '.'
debug_ll_ns16550_outnl
-ENTRY_FUNCTION_END(BOARD_PBL_START, rzx50)
+ENTRY_FUNCTION_END(BOARD_PBL_START, rzx50, SZ_64M)
diff --git a/arch/mips/boards/tplink-mr3020/lowlevel.S b/arch/mips/boards/tplink-mr3020/lowlevel.S
index 0a1c193..b96292e 100644
--- a/arch/mips/boards/tplink-mr3020/lowlevel.S
+++ b/arch/mips/boards/tplink-mr3020/lowlevel.S
@@ -11,9 +11,10 @@
#include <asm/asm.h>
#include <mach/pbl_macros.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
ar9331_pbl_generic_start
-ENTRY_FUNCTION_END(BOARD_PBL_START, tplink_mr3020)
+ENTRY_FUNCTION_END(BOARD_PBL_START, tplink_mr3020, SZ_32M)
diff --git a/arch/mips/boards/tplink-wdr4300/lowlevel.S b/arch/mips/boards/tplink-wdr4300/lowlevel.S
index 461b257..8aed5dd 100644
--- a/arch/mips/boards/tplink-wdr4300/lowlevel.S
+++ b/arch/mips/boards/tplink-wdr4300/lowlevel.S
@@ -11,6 +11,7 @@
#include <mach/pbl_macros.h>
#include <mach/pbl_ll_init_ar9344_1.1.h>
#include <asm/pbl_nmon.h>
+#include <linux/sizes.h>
ENTRY_FUNCTION(BOARD_PBL_START)
@@ -35,4 +36,4 @@ skip_flash_test:
skip_pll_ram_config:
-ENTRY_FUNCTION_END(BOARD_PBL_START, ar9344_tl_wdr4300_v1.7)
+ENTRY_FUNCTION_END(BOARD_PBL_START, ar9344_tl_wdr4300_v1.7, SZ_128M)
diff --git a/arch/mips/boot/dtb.c b/arch/mips/boot/dtb.c
index ea30e16..5e31627 100644
--- a/arch/mips/boot/dtb.c
+++ b/arch/mips/boot/dtb.c
@@ -29,10 +29,6 @@ void of_add_memory_bank(struct device_node *node, bool dump, int r,
if (dump)
pr_info("%s: %s: 0x%llx@0x%llx\n", node->name, str, size, base);
-
- if (glob_fdt && glob_fdt_size)
- request_sdram_region("fdt", (resource_size_t)glob_fdt,
- glob_fdt_size);
}
extern char __dtb_start[];
diff --git a/arch/mips/boot/main_entry-pbl.c b/arch/mips/boot/main_entry-pbl.c
index b40887b..02ddd5e 100644
--- a/arch/mips/boot/main_entry-pbl.c
+++ b/arch/mips/boot/main_entry-pbl.c
@@ -18,14 +18,14 @@ extern void *input_data_end;
unsigned long free_mem_ptr;
unsigned long free_mem_end_ptr;
-void pbl_main_entry(void *fdt, void *fdt_end);
+void pbl_main_entry(void *fdt, void *fdt_end, u32 ram_size);
static unsigned long *ttb;
static void barebox_uncompress(void *compressed_start, unsigned int len)
{
/* set 128 KiB at the end of the MALLOC_BASE for early malloc */
- free_mem_ptr = MALLOC_BASE + MALLOC_SIZE - SZ_128K;
+ free_mem_ptr = TEXT_BASE - SZ_128K;
free_mem_end_ptr = free_mem_ptr + SZ_128K;
ttb = (void *)((free_mem_ptr - 0x4000) & ~0x3fff);
@@ -33,11 +33,12 @@ static void barebox_uncompress(void *compressed_start, unsigned int len)
pbl_barebox_uncompress((void*)TEXT_BASE, compressed_start, len);
}
-void __section(.text_entry) pbl_main_entry(void *fdt, void *fdt_end)
+void __section(.text_entry) pbl_main_entry(void *fdt, void *fdt_end,
+ u32 ram_size)
{
u32 pg_start, pg_end, pg_len, fdt_len;
void *fdt_new;
- void (*barebox)(void *fdt, u32 fdt_len);
+ void (*barebox)(void *fdt, u32 fdt_len, u32 ram_size);
puts_ll("pbl_main_entry()\n");
@@ -51,9 +52,9 @@ void __section(.text_entry) pbl_main_entry(void *fdt, void *fdt_end)
barebox_uncompress(&input_data, pg_len);
fdt_len = (u32)fdt_end - (u32)fdt;
- fdt_new = (void *)PAGE_ALIGN_DOWN(STACK_BASE - fdt_len);
+ fdt_new = (void *)PAGE_ALIGN_DOWN(TEXT_BASE - MALLOC_SIZE - STACK_SIZE - fdt_len);
memcpy(fdt_new, fdt, fdt_len);
barebox = (void *)TEXT_BASE;
- barebox(fdt_new, fdt_len);
+ barebox(fdt_new, fdt_len, ram_size);
}
diff --git a/arch/mips/boot/main_entry.c b/arch/mips/boot/main_entry.c
index 84325da..5b88730 100644
--- a/arch/mips/boot/main_entry.c
+++ b/arch/mips/boot/main_entry.c
@@ -12,6 +12,7 @@
#include <asm/cpu-features.h>
#include <asm/mipsregs.h>
#include <asm/addrspace.h>
+#include <linux/sizes.h>
extern void handle_reserved(void);
@@ -61,6 +62,7 @@ static void trap_init(void)
extern void *glob_fdt;
extern u32 glob_fdt_size;
+extern unsigned long mips_stack_top;
/**
* Called plainly from assembler code
@@ -69,6 +71,7 @@ extern u32 glob_fdt_size;
*/
void __bare_init main_entry(void *fdt, u32 fdt_size)
{
+ unsigned long malloc_start, malloc_end;
/* clear the BSS first */
memset(__bss_start, 0x00, __bss_stop - __bss_start);
@@ -82,8 +85,18 @@ void __bare_init main_entry(void *fdt, u32 fdt_size)
trap_init();
- mem_malloc_init((void *)MALLOC_BASE,
- (void *)(MALLOC_BASE + MALLOC_SIZE - 1));
+ malloc_end = _stext;
+
+ if (MALLOC_SIZE > 0)
+ malloc_start = malloc_end - MALLOC_SIZE;
+ else
+ malloc_start = malloc_end - SZ_8M;
+
+ pr_debug("initializing malloc pool at 0x%08lx (size 0x%08lx)\n",
+ malloc_start, malloc_end - malloc_start);
+
+ mem_malloc_init((void *)malloc_start, (void *)_stext - 1);
+ mips_stack_top = malloc_start;
glob_fdt = fdt;
glob_fdt_size = fdt_size;
diff --git a/arch/mips/boot/start.S b/arch/mips/boot/start.S
index 6efe03e..c1cd2d9 100644
--- a/arch/mips/boot/start.S
+++ b/arch/mips/boot/start.S
@@ -18,6 +18,7 @@ EXPORT(_start)
/* save dtb pointer */
move s0, a0
move s1, a1
+ move s2, a2
/* disable watchpoints */
mtc0 zero, CP0_WATCHLO
@@ -32,7 +33,8 @@ EXPORT(_start)
/* restore dtb pointer */
move a0, s0
move a1, s1
- la v0, main_entry
+ move a2, s2
+ la v0, relocate_code
jal v0
nop
diff --git a/arch/mips/include/asm/asm.h b/arch/mips/include/asm/asm.h
index 7d2b673..a85467c 100644
--- a/arch/mips/include/asm/asm.h
+++ b/arch/mips/include/asm/asm.h
@@ -89,13 +89,14 @@ EXPORT(symbol)
/*
* ENTRY_FUNCTION_END - mark end of entry function
*/
-#define ENTRY_FUNCTION_END(symbol, dtb) \
+#define ENTRY_FUNCTION_END(symbol, dtb, ram_size) \
mips_nmon; \
copy_to_link_location symbol; \
stack_setup; \
\
la a0, __dtb_ ## dtb##_start; \
la a1, __dtb_ ## dtb##_end; \
+ li a2, ram_size; \
la v0, pbl_main_entry; \
jal v0; \
nop; \
diff --git a/arch/mips/include/asm/pbl_macros.h b/arch/mips/include/asm/pbl_macros.h
index e78d1af..c62910f 100644
--- a/arch/mips/include/asm/pbl_macros.h
+++ b/arch/mips/include/asm/pbl_macros.h
@@ -187,7 +187,7 @@ copy_loop_exit:
*
*/
-#if (STACK_BASE + STACK_SIZE) % 16 != 0
+#if (TEXT_BASE - MALLOC_SIZE) % 16 != 0
#error stack pointer must be 16-byte-aligned
#endif
@@ -196,7 +196,7 @@ copy_loop_exit:
.set noreorder
/* set stack pointer; reserve four 32-bit argument slots */
- la sp, STACK_BASE + STACK_SIZE - 16
+ la sp, (TEXT_BASE - MALLOC_SIZE - 16)
.set pop
.endm
diff --git a/arch/mips/include/asm/relocs.h b/arch/mips/include/asm/relocs.h
new file mode 100644
index 0000000..0987c4b
--- /dev/null
+++ b/arch/mips/include/asm/relocs.h
@@ -0,0 +1,23 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * MIPS Relocations
+ *
+ * Copyright (c) 2017 Imagination Technologies Ltd.
+ */
+
+#ifndef __ASM_MIPS_RELOCS_H__
+#define __ASM_MIPS_RELOCS_H__
+
+#define R_MIPS_NONE 0
+#define R_MIPS_32 2
+#define R_MIPS_26 4
+#define R_MIPS_HI16 5
+#define R_MIPS_LO16 6
+#define R_MIPS_PC16 10
+#define R_MIPS_64 18
+#define R_MIPS_HIGHER 28
+#define R_MIPS_HIGHEST 29
+#define R_MIPS_PC21_S2 60
+#define R_MIPS_PC26_S2 61
+
+#endif /* __ASM_MIPS_RELOCS_H__ */
diff --git a/arch/mips/include/asm/sections.h b/arch/mips/include/asm/sections.h
index 2b8c516..8e004ea 100644
--- a/arch/mips/include/asm/sections.h
+++ b/arch/mips/include/asm/sections.h
@@ -1 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef __ASM_MIPS_SECTIONS_H
+#define __ASM_MIPS_SECTIONS_H
+
#include <asm-generic/sections.h>
+
+/**
+ * __rel_start: Relocation data generated by the mips-relocs tool
+ *
+ * See arch/mips/lib/reloc.c for details on the format & use of this data.
+ */
+extern uint8_t __rel_start[];
+
+#endif
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 7372e8d..4ba42e5 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -4,6 +4,8 @@ obj-y += cpu-probe.o
lwl-y += end.o
obj-y += traps.o
obj-y += genex.o
+obj-y += reloc.o
+obj-y += sections.o
obj-y += shutdown.o
obj-y += dma-default.o
diff --git a/arch/mips/lib/barebox.lds.S b/arch/mips/lib/barebox.lds.S
index 8ddf954..58b0c59 100644
--- a/arch/mips/lib/barebox.lds.S
+++ b/arch/mips/lib/barebox.lds.S
@@ -13,6 +13,8 @@ SECTIONS
. = TEXT_BASE;
. = ALIGN(4);
+
+ .image_start : { *(.__image_start) }
.text :
{
_stext = .;
@@ -79,9 +81,28 @@ SECTIONS
.dtb : { BAREBOX_DTB() }
_edata = .;
+ .image_end : { *(.__image_end) }
+
. = ALIGN(4);
- __bss_start = .;
- .bss : { *(.bss*) }
- __bss_stop = .;
+ /*
+ * .rel must come last so that the mips-relocs tool can shrink
+ * the section size & the PT_LOAD program header filesz.
+ */
+ .data.reloc : {
+ __rel_start = .;
+ BYTE(0x0)
+ . += (32 * 1024) - 1;
+ }
+
_end = .;
+
+ .bss __rel_start (OVERLAY) : {
+ __bss_start = .;
+ *(.sbss.*)
+ *(.bss.*)
+ *(COMMON)
+ . = ALIGN(4);
+ __bss_stop = .;
+ }
+
}
diff --git a/arch/mips/lib/cpu-probe.c b/arch/mips/lib/cpu-probe.c
index cf63849..2556a8b 100644
--- a/arch/mips/lib/cpu-probe.c
+++ b/arch/mips/lib/cpu-probe.c
@@ -11,6 +11,9 @@
#include <asm/mipsregs.h>
#include <asm/cpu-info.h>
#include <asm/cpu.h>
+#include <memory.h>
+#include <asm-generic/memory_layout.h>
+#include <init.h>
const char *__cpu_name;
struct cpuinfo_mips cpu_data[1];
@@ -161,3 +164,14 @@ void cpu_probe(void)
break;
}
}
+
+unsigned long mips_stack_top;
+
+static int mips_request_stack(void)
+{
+ if (!request_sdram_region("stack", mips_stack_top - STACK_SIZE, STACK_SIZE))
+ pr_err("Error: Cannot request SDRAM region for stack\n");
+
+ return 0;
+}
+coredevice_initcall(mips_request_stack);
diff --git a/arch/mips/lib/pbl.lds.S b/arch/mips/lib/pbl.lds.S
index f1752ec..75069b0 100644
--- a/arch/mips/lib/pbl.lds.S
+++ b/arch/mips/lib/pbl.lds.S
@@ -6,11 +6,14 @@
#include <asm-generic/barebox.lds.h>
#include <asm-generic/memory_layout.h>
+#include <linux/sizes.h>
+
+#define BASE (TEXT_BASE - SZ_2M)
OUTPUT_ARCH("mips")
SECTIONS
{
- . = HEAD_TEXT_BASE;
+ . = BASE;
PRE_IMAGE
@@ -38,21 +41,21 @@ SECTIONS
. = ALIGN(4);
.data : { *(.data*) }
- pbl_code_size = . - HEAD_TEXT_BASE;
+ pbl_code_size = . - BASE;
. = ALIGN(4);
__piggydata_start = .;
.piggydata : {
*(.piggydata)
}
- __piggydata_end = .;
+ __piggydata_end = . - BASE;
- pbl_image_size = . - HEAD_TEXT_BASE;
+ pbl_image_size = .;
. = ALIGN(4);
__bss_start = .;
.bss : { *(.bss*) }
__bss_stop = .;
- pbl_memory_size = . - HEAD_TEXT_BASE;
+ pbl_memory_size = . - BASE;
_end = .;
}
diff --git a/arch/mips/lib/reloc.c b/arch/mips/lib/reloc.c
new file mode 100644
index 0000000..9756d61
--- /dev/null
+++ b/arch/mips/lib/reloc.c
@@ -0,0 +1,182 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MIPS Relocation
+ *
+ * Copyright (c) 2017 Imagination Technologies Ltd.
+ *
+ * Relocation data, found in the .rel section, is generated by the mips-relocs
+ * tool & contains a record of all locations in the Barebox binary that need to
+ * be fixed up during relocation.
+ *
+ * The data is a sequence of unsigned integers, which are of somewhat arbitrary
+ * size. This is achieved by encoding integers as a sequence of bytes, each of
+ * which contains 7 bits of data with the most significant bit indicating
+ * whether any further bytes need to be read. The least significant bits of the
+ * integer are found in the first byte - ie. it somewhat resembles little
+ * endian.
+ *
+ * Each pair of two integers represents a relocation that must be applied. The
+ * first integer represents the type of relocation as a standard ELF relocation
+ * type (ie. R_MIPS_*). The second integer represents the offset at which to
+ * apply the relocation, relative to the previous relocation or for the first
+ * relocation the start of the relocated .text section.
+ *
+ * The end of the relocation data is indicated when type R_MIPS_NONE (0) is
+ * read, at which point no further integers should be read. That is, the
+ * terminating R_MIPS_NONE reloc includes no offset.
+ */
+
+#include <common.h>
+
+#include <asm/bitops.h>
+#include <asm/cache.h>
+#include <asm/cacheops.h>
+#include <asm/cpu.h>
+#include <asm/cpu-info.h>
+#include <asm/io.h>
+#include <asm/mipsregs.h>
+#include <asm/relocs.h>
+#include <asm/sections.h>
+#include <linux/sizes.h>
+#include <asm-generic/memory_layout.h>
+
+#define MAX_BSS_SIZE SZ_1M
+
+void main_entry(void *fdt, u32 fdt_size);
+void relocate_code(void *fdt, u32 fdt_size, u32 relocaddr);
+
+/**
+ * read_uint() - Read an unsigned integer from the buffer
+ * @buf: pointer to a pointer to the reloc buffer
+ *
+ * Read one whole unsigned integer from the relocation data pointed to by @buf,
+ * advancing @buf past the bytes encoding the integer.
+ *
+ * Returns: the integer read from @buf
+ */
+static unsigned long read_uint(uint8_t **buf)
+{
+ unsigned long val = 0;
+ unsigned int shift = 0;
+ uint8_t new;
+
+ do {
+ new = *(*buf)++;
+ val |= (new & 0x7f) << shift;
+ shift += 7;
+ } while (new & 0x80);
+
+ return val;
+}
+
+/**
+ * apply_reloc() - Apply a single relocation
+ * @type: the type of reloc (R_MIPS_*)
+ * @addr: the address that the reloc should be applied to
+ * @off: the relocation offset, ie. number of bytes we're moving Barebox by
+ *
+ * Apply a single relocation of type @type at @addr. This function is
+ * intentionally simple, and does the bare minimum needed to fixup the
+ * relocated Barebox - in particular, it does not check for overflows.
+ */
+static void apply_reloc(unsigned int type, void *addr, long off)
+{
+ uint32_t u32;
+
+ switch (type) {
+ case R_MIPS_26:
+ u32 = *(uint32_t *)addr;
+ u32 = (u32 & GENMASK(31, 26)) |
+ ((u32 + (off >> 2)) & GENMASK(25, 0));
+ *(uint32_t *)addr = u32;
+ break;
+
+ case R_MIPS_32:
+ *(uint32_t *)addr += off;
+ break;
+
+ case R_MIPS_64:
+ *(uint64_t *)addr += off;
+ break;
+
+ case R_MIPS_HI16:
+ *(uint32_t *)addr += off >> 16;
+ break;
+
+ default:
+ panic("Unhandled reloc type %u\n", type);
+ }
+}
+
+/**
+ * relocate_code() - Relocate Barebox, generally from flash to DDR
+ * @start_addr_sp: new stack pointer
+ * @new_gd: pointer to relocated global data
+ * @relocaddr: the address to relocate to
+ *
+ * Relocate Barebox from its current location (generally in flash) to a new one
+ * (generally in DDR). This function will copy the Barebox binary & apply
+ * relocations as necessary, then jump to board_init_r in the new build of
+ * Barebox. As such, this function does not return.
+ */
+void relocate_code(void *fdt, u32 fdt_size, u32 ram_size)
+{
+ unsigned long addr, length, bss_len;
+ u32 relocaddr, new_stack;
+ uint8_t *buf, *bss_start;
+ unsigned int type;
+ long off;
+
+ length = barebox_image_size + MAX_BSS_SIZE;
+ relocaddr = ALIGN_DOWN(ram_size - barebox_image_size, SZ_64K);
+ relocaddr = KSEG0ADDR(relocaddr);
+ new_stack = relocaddr - MALLOC_SIZE - 16;
+
+ /*
+ * Ensure that we're relocating by an offset which is a multiple of
+ * 64KiB, ie. doesn't change the least significant 16 bits of any
+ * addresses. This allows us to discard R_MIPS_LO16 relocs, saving
+ * space in the Barebox binary & complexity in handling them.
+ */
+ off = relocaddr - (unsigned long)__image_start;
+ if (off & 0xffff)
+ panic("Mis-aligned relocation\n");
+
+ /* Copy Barebox to RAM */
+ memcpy((void *)relocaddr, __image_start, length);
+
+ /* Now apply relocations to the copy in RAM */
+ buf = __rel_start;
+ addr = relocaddr;
+ while (true) {
+ type = read_uint(&buf);
+ if (type == R_MIPS_NONE)
+ break;
+
+ addr += read_uint(&buf) << 2;
+ apply_reloc(type, (void *)addr, off);
+ }
+
+ /* Ensure the icache is coherent */
+ flush_cache_all();
+
+ /* Clear the .bss section */
+ bss_start = (uint8_t *)((unsigned long)__bss_start + off);
+ bss_len = (unsigned long)&__bss_stop - (unsigned long)__bss_start;
+ memset(bss_start, 0, bss_len);
+
+ __asm__ __volatile__ (
+ "move $a0, %0\n"
+ " move $a1, %1\n"
+ " move $31, $0\n"
+ " move $sp, %2\n"
+ " jr %3\n"
+ : /* no outputs */
+ : "r"(fdt),
+ "r"(fdt_size),
+ "r"(new_stack),
+ "r"((unsigned long)main_entry + off));
+
+ /* Since we jumped to the new Barebox above, we won't get here */
+ unreachable();
+}
diff --git a/arch/mips/lib/sections.c b/arch/mips/lib/sections.c
new file mode 100644
index 0000000..66d559f
--- /dev/null
+++ b/arch/mips/lib/sections.c
@@ -0,0 +1,9 @@
+#include <common.h>
+#include <asm/sections.h>
+#include <linux/types.h>
+
+char _text[0] __attribute__((section("._text")));
+char __bss_start[0] __attribute__((section(".__bss_start")));
+char __bss_stop[0] __attribute__((section(".__bss_stop")));
+char __image_start[0] __attribute__((section(".__image_start")));
+char __image_end[0] __attribute__((section(".__image_end")));
diff --git a/scripts/Makefile b/scripts/Makefile
index 712cf99..1af5f9f 100644
--- a/scripts/Makefile
+++ b/scripts/Makefile
@@ -12,6 +12,7 @@ hostprogs-y += bareboxcrc32
hostprogs-y += kernel-install
hostprogs-$(CONFIG_IMD) += bareboximd
hostprogs-$(CONFIG_KALLSYMS) += kallsyms
+hostprogs-$(CONFIG_MIPS) += mips-relocs
hostprogs-$(CONFIG_MVEBU_HOSTTOOLS) += kwbimage kwboot
hostprogs-$(CONFIG_ARCH_NETX) += gen_netx_image
hostprogs-$(CONFIG_ARCH_OMAP) += omap_signGP mk-omap-image
diff --git a/scripts/mips-relocs.c b/scripts/mips-relocs.c
new file mode 100644
index 0000000..7916159
--- /dev/null
+++ b/scripts/mips-relocs.c
@@ -0,0 +1,426 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * MIPS Relocation Data Generator
+ *
+ * Copyright (c) 2017 Imagination Technologies Ltd.
+ */
+
+#include <assert.h>
+#include <elf.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <../../arch/mips/include/asm/relocs.h>
+
+#define hdr_field(pfx, idx, field) ({ \
+ uint64_t _val; \
+ unsigned int _size; \
+ \
+ if (is_64) { \
+ _val = pfx##hdr64[idx].field; \
+ _size = sizeof(pfx##hdr64[0].field); \
+ } else { \
+ _val = pfx##hdr32[idx].field; \
+ _size = sizeof(pfx##hdr32[0].field); \
+ } \
+ \
+ switch (_size) { \
+ case 1: \
+ break; \
+ case 2: \
+ _val = is_be ? be16toh(_val) : le16toh(_val); \
+ break; \
+ case 4: \
+ _val = is_be ? be32toh(_val) : le32toh(_val); \
+ break; \
+ case 8: \
+ _val = is_be ? be64toh(_val) : le64toh(_val); \
+ break; \
+ } \
+ \
+ _val; \
+})
+
+#define set_hdr_field(pfx, idx, field, val) ({ \
+ uint64_t _val; \
+ unsigned int _size; \
+ \
+ if (is_64) \
+ _size = sizeof(pfx##hdr64[0].field); \
+ else \
+ _size = sizeof(pfx##hdr32[0].field); \
+ \
+ switch (_size) { \
+ case 1: \
+ _val = val; \
+ break; \
+ case 2: \
+ _val = is_be ? htobe16(val) : htole16(val); \
+ break; \
+ case 4: \
+ _val = is_be ? htobe32(val) : htole32(val); \
+ break; \
+ case 8: \
+ _val = is_be ? htobe64(val) : htole64(val); \
+ break; \
+ default: \
+ /* We should never reach here */ \
+ _val = 0; \
+ assert(0); \
+ break; \
+ } \
+ \
+ if (is_64) \
+ pfx##hdr64[idx].field = _val; \
+ else \
+ pfx##hdr32[idx].field = _val; \
+})
+
+#define ehdr_field(field) \
+ hdr_field(e, 0, field)
+#define phdr_field(idx, field) \
+ hdr_field(p, idx, field)
+#define shdr_field(idx, field) \
+ hdr_field(s, idx, field)
+
+#define set_phdr_field(idx, field, val) \
+ set_hdr_field(p, idx, field, val)
+#define set_shdr_field(idx, field, val) \
+ set_hdr_field(s, idx, field, val)
+
+#define shstr(idx) (&shstrtab[idx])
+
+bool is_64, is_be;
+uint64_t text_base;
+
+struct mips_reloc {
+ uint8_t type;
+ uint64_t offset;
+} *relocs;
+size_t relocs_sz, relocs_idx;
+
+static int add_reloc(unsigned int type, uint64_t off)
+{
+ struct mips_reloc *new;
+ size_t new_sz;
+
+ switch (type) {
+ case R_MIPS_NONE:
+ case R_MIPS_LO16:
+ case R_MIPS_PC16:
+ case R_MIPS_HIGHER:
+ case R_MIPS_HIGHEST:
+ case R_MIPS_PC21_S2:
+ case R_MIPS_PC26_S2:
+ /* Skip these relocs */
+ return 0;
+
+ default:
+ break;
+ }
+
+ if (relocs_idx == relocs_sz) {
+ new_sz = relocs_sz ? relocs_sz * 2 : 128;
+ new = realloc(relocs, new_sz * sizeof(*relocs));
+ if (!new) {
+ fprintf(stderr, "Out of memory\n");
+ return -ENOMEM;
+ }
+
+ relocs = new;
+ relocs_sz = new_sz;
+ }
+
+ relocs[relocs_idx++] = (struct mips_reloc){
+ .type = type,
+ .offset = off,
+ };
+
+ return 0;
+}
+
+static int parse_mips32_rel(const void *_rel)
+{
+ const Elf32_Rel *rel = _rel;
+ uint32_t off, type;
+
+ off = is_be ? be32toh(rel->r_offset) : le32toh(rel->r_offset);
+ off -= text_base;
+
+ type = is_be ? be32toh(rel->r_info) : le32toh(rel->r_info);
+ type = ELF32_R_TYPE(type);
+
+ return add_reloc(type, off);
+}
+
+static int parse_mips64_rela(const void *_rel)
+{
+ const Elf64_Rela *rel = _rel;
+ uint64_t off, type;
+
+ off = is_be ? be64toh(rel->r_offset) : le64toh(rel->r_offset);
+ off -= text_base;
+
+ type = rel->r_info >> (64 - 8);
+
+ return add_reloc(type, off);
+}
+
+static void output_uint(uint8_t **buf, uint64_t val)
+{
+ uint64_t tmp;
+
+ do {
+ tmp = val & 0x7f;
+ val >>= 7;
+ tmp |= !!val << 7;
+ *(*buf)++ = tmp;
+ } while (val);
+}
+
+static int compare_relocs(const void *a, const void *b)
+{
+ const struct mips_reloc *ra = a, *rb = b;
+
+ return ra->offset - rb->offset;
+}
+
+int main(int argc, char *argv[])
+{
+ unsigned int i, j, i_rel_shdr, sh_type, sh_entsize, sh_entries;
+ size_t rel_size, rel_actual_size;
+ const char *shstrtab, *sh_name, *rel_pfx;
+ int (*parse_fn)(const void *rel);
+ uint8_t *buf_start, *buf;
+ const Elf32_Ehdr *ehdr32;
+ const Elf64_Ehdr *ehdr64;
+ uintptr_t sh_offset;
+ Elf32_Shdr *shdr32;
+ Elf64_Shdr *shdr64;
+ struct stat st;
+ int err, fd;
+ void *elf;
+ bool skip;
+
+ fd = open(argv[1], O_RDWR);
+ if (fd == -1) {
+ fprintf(stderr, "Unable to open input file %s\n", argv[1]);
+ err = errno;
+ goto out_ret;
+ }
+
+ err = fstat(fd, &st);
+ if (err) {
+ fprintf(stderr, "Unable to fstat() input file\n");
+ goto out_close_fd;
+ }
+
+ elf = mmap(NULL, st.st_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if (elf == MAP_FAILED) {
+ fprintf(stderr, "Unable to mmap() input file\n");
+ err = errno;
+ goto out_close_fd;
+ }
+
+ ehdr32 = elf;
+ ehdr64 = elf;
+
+ if (memcmp(&ehdr32->e_ident[EI_MAG0], ELFMAG, SELFMAG)) {
+ fprintf(stderr, "Input file is not an ELF\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ if (ehdr32->e_ident[EI_VERSION] != EV_CURRENT) {
+ fprintf(stderr, "Unrecognised ELF version\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ switch (ehdr32->e_ident[EI_CLASS]) {
+ case ELFCLASS32:
+ is_64 = false;
+ break;
+ case ELFCLASS64:
+ is_64 = true;
+ break;
+ default:
+ fprintf(stderr, "Unrecognised ELF class\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ switch (ehdr32->e_ident[EI_DATA]) {
+ case ELFDATA2LSB:
+ is_be = false;
+ break;
+ case ELFDATA2MSB:
+ is_be = true;
+ break;
+ default:
+ fprintf(stderr, "Unrecognised ELF data encoding\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ if (ehdr_field(e_type) != ET_EXEC) {
+ fprintf(stderr, "Input ELF is not an executable\n");
+ printf("type 0x%lx\n", ehdr_field(e_type));
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ if (ehdr_field(e_machine) != EM_MIPS) {
+ fprintf(stderr, "Input ELF does not target MIPS\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ shdr32 = elf + ehdr_field(e_shoff);
+ shdr64 = elf + ehdr_field(e_shoff);
+ shstrtab = elf + shdr_field(ehdr_field(e_shstrndx), sh_offset);
+
+ i_rel_shdr = UINT_MAX;
+ for (i = 0; i < ehdr_field(e_shnum); i++) {
+ sh_name = shstr(shdr_field(i, sh_name));
+
+ if (!strcmp(sh_name, ".data.reloc")) {
+ i_rel_shdr = i;
+ continue;
+ }
+
+ if (!strcmp(sh_name, ".text")) {
+ text_base = shdr_field(i, sh_addr);
+ continue;
+ }
+ }
+ if (i_rel_shdr == UINT_MAX) {
+ fprintf(stderr, "Unable to find .rel section\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+ if (!text_base) {
+ fprintf(stderr, "Unable to find .text base address\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ rel_pfx = is_64 ? ".rela." : ".rel.";
+
+ for (i = 0; i < ehdr_field(e_shnum); i++) {
+ sh_type = shdr_field(i, sh_type);
+ if ((sh_type != SHT_REL) && (sh_type != SHT_RELA))
+ continue;
+
+ sh_name = shstr(shdr_field(i, sh_name));
+ if (strncmp(sh_name, rel_pfx, strlen(rel_pfx))) {
+ if (strcmp(sh_name, ".rel") && strcmp(sh_name, ".rel.dyn"))
+ fprintf(stderr, "WARNING: Unexpected reloc section name '%s'\n", sh_name);
+ continue;
+ }
+
+ /*
+ * Skip reloc sections which either don't correspond to another
+ * section in the ELF, or whose corresponding section isn't
+ * loaded as part of the U-Boot binary (ie. doesn't have the
+ * alloc flags set).
+ */
+ skip = true;
+ for (j = 0; j < ehdr_field(e_shnum); j++) {
+ if (strcmp(&sh_name[strlen(rel_pfx) - 1], shstr(shdr_field(j, sh_name))))
+ continue;
+
+ skip = !(shdr_field(j, sh_flags) & SHF_ALLOC);
+ break;
+ }
+ if (skip)
+ continue;
+
+ sh_offset = shdr_field(i, sh_offset);
+ sh_entsize = shdr_field(i, sh_entsize);
+ sh_entries = shdr_field(i, sh_size) / sh_entsize;
+
+ if (sh_type == SHT_REL) {
+ if (is_64) {
+ fprintf(stderr, "REL-style reloc in MIPS64 ELF?\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ } else {
+ parse_fn = parse_mips32_rel;
+ }
+ } else {
+ if (is_64) {
+ parse_fn = parse_mips64_rela;
+ } else {
+ fprintf(stderr, "RELA-style reloc in MIPS32 ELF?\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+ }
+
+ for (j = 0; j < sh_entries; j++) {
+ err = parse_fn(elf + sh_offset + (j * sh_entsize));
+ if (err)
+ goto out_free_relocs;
+ }
+ }
+
+ if (!relocs) {
+ fprintf(stderr, "No relocs was found. Try to configure linker with --emit-relocs\n");
+ err = -EINVAL;
+ goto out_free_relocs;
+ }
+
+ /* Sort relocs in ascending order of offset */
+ qsort(relocs, relocs_idx, sizeof(*relocs), compare_relocs);
+
+ /* Make reloc offsets relative to their predecessor */
+ for (i = relocs_idx - 1; i > 0; i--) {
+ relocs[i].offset -= relocs[i - 1].offset;
+ }
+
+ /* Write the relocations to the .rel section */
+ buf = buf_start = elf + shdr_field(i_rel_shdr, sh_offset);
+ for (i = 0; i < relocs_idx; i++) {
+ output_uint(&buf, relocs[i].type);
+ output_uint(&buf, relocs[i].offset >> 2);
+ }
+
+ /* Write a terminating R_MIPS_NONE (0) */
+ output_uint(&buf, R_MIPS_NONE);
+
+ /* Ensure the relocs didn't overflow the .rel section */
+ rel_size = shdr_field(i_rel_shdr, sh_size);
+ rel_actual_size = buf - buf_start;
+ if (rel_actual_size > rel_size) {
+ fprintf(stderr, "Relocations overflow available space of 0x%lx (required 0x%lx)!\n",
+ rel_size, rel_actual_size);
+ fprintf(stderr, "Please adjust CONFIG_MIPS_RELOCATION_TABLE_SIZE to at least 0x%lx\n",
+ (rel_actual_size + 0x100) & ~0xFF);
+ err = -ENOMEM;
+ goto out_free_relocs;
+ }
+
+ /* Make sure data is written back to the file */
+ err = msync(elf, st.st_size, MS_SYNC);
+ if (err) {
+ fprintf(stderr, "Failed to msync: %d\n", errno);
+ goto out_free_relocs;
+ }
+
+out_free_relocs:
+ free(relocs);
+ munmap(elf, st.st_size);
+out_close_fd:
+ close(fd);
+out_ret:
+ return err;
+}