Changes since U-Boot 1.0.1:
======================================================================
+* Patch by Anders Larsen, 09 Jan 2004:
+
+ ARM memory layout fixes: the abort-stack is now set up in the
+ correct RAM area, and the BSS is zeroed out as it should be.
+
+ Furthermore, the magic variables 'armboot_end' and 'armboot_end_data'
+ of the linker scripts are replaced by '__bss_start' and '_end',
+ resp., which is a further step to eliminate unnecessary differences
+ between the implementation of the CPU architectures.
+
* Patch by liang a lei, 9 Jan 2004:
Fix Intel 28F128J3 ID in include/flash.h
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
-
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
-
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
-
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
+ _end = .;
}
#TEXT_BASE = 0x00100000
-TEXT_BASE = 0x00f00000
+TEXT_BASE = 0x00f80000
flash_get_offsets (PHYS_FLASH_1, &flash_info[i]);
break;
default:
- panic ("configured to many flash banks!\n");
+ panic ("configured too many flash banks!\n");
break;
}
size += flash_info[i].size;
*/
flash_protect (FLAG_PROTECT_SET,
CFG_FLASH_BASE,
- CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
+ CFG_FLASH_BASE + _bss_start - _armboot_start,
&flash_info[0]);
flash_protect (FLAG_PROTECT_SET,
.u_boot_cmd : { *(.u_boot_cmd) }
__u_boot_cmd_end = .;
- armboot_end_data = .;
-
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
+ _end = .;
}
*/
flash_protect(FLAG_PROTECT_SET,
CFG_FLASH_BASE,
- CFG_FLASH_BASE + _armboot_end_data - _armboot_start,
+ CFG_FLASH_BASE + _bss_start - _armboot_start,
&flash_info[0]);
flash_protect(FLAG_PROTECT_SET,
. = ALIGN(4);
.got : { *(.got) }
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
+ _end = .;
}
#TEXT_BASE = 0xa1700000
-TEXT_BASE = 0xa3000000
+TEXT_BASE = 0xa3080000
#TEXT_BASE = 0
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
+ _end = .;
}
# Linux-Kernel is expected to be at 3000'8000, entry 3000'8000
# optionally with a ramdisk at 3040'0000
#
-# we load ourself to 30F8'0000
+# we load ourself to 33F8'0000
#
# download area is 3080'0000
#
#TEXT_BASE = 0x30F80000
-TEXT_BASE = 0x33F00000
+TEXT_BASE = 0x33F80000
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
+ _end = .;
}
#
# Linux-Kernel is expected to be at 1000'8000, entry 1000'8000 (mem base + reserved)
#
-# we load ourself to 1100'0000
+# we load ourself to 1108'0000
#
#
-TEXT_BASE = 0x11000000
+TEXT_BASE = 0x11080000
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
+ _end = .;
}
# Linux-Kernel is expected to be at 1000'8000, entry 1000'8000
# (mem base + reserved)
#
-# we load ourself to 1100'0000
+# we load ourself to 1108'0000
#
#
-TEXT_BASE = 0x11000000
+TEXT_BASE = 0x11080000
.u_boot_cmd : { *(.u_boot_cmd) }
__u_boot_cmd_end = .;
- armboot_end_data = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
- armboot_end = .;
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
-
+ _end = .;
}
# Linux-Kernel is expected to be at 0cf0'0000, entry 0cf0'0000
# optionally with a ramdisk at 0c80'0000
#
-# we load ourself to 0CF00000 (must be high enough not to be
+# we load ourself to 0CF80000 (must be high enough not to be
# overwritten by the uncompessing Linux kernel)
#
# download area is 0C80'0000
#
-TEXT_BASE = 0x0CF00000
+TEXT_BASE = 0x0CF80000
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
-
+ _end = .;
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
- armboot_end = .;
-
+ _end = .;
}
lib_generic/string.o (.text)
. = DEFINED(env_offset) ? env_offset : .;
- common/environment.o (.ppcenv)
+ common/environment.o (.ppcenv)
*(.text)
}
. = ALIGN(4);
.got : { *(.got) }
- __u_boot_cmd_start = .;
- .u_boot_cmd : { *(.u_boot_cmd) }
- __u_boot_cmd_end = .;
-
- armboot_end_data = .;
+ __u_boot_cmd_start = .;
+ .u_boot_cmd : { *(.u_boot_cmd) }
+ __u_boot_cmd_end = .;
. = ALIGN(4);
+ __bss_start = .;
.bss : { *(.bss) }
-
-
- armboot_end = .;
+ _end = .;
}
.u_boot_cmd : { *(.u_boot_cmd) }
__u_boot_cmd_end = .;
- armboot_end_data = .;
-
. = ALIGN(4);
- bss_start = .;
+ __bss_start = .;
.bss : { *(.bss) }
- bss_end = .;
-
- armboot_end = .;
+ _end = .;
}
#ifdef CONFIG_SILENT_CONSOLE
if (gd->flags & GD_FLG_SILENT)
- return(0);
+ return;
#endif
if (gd->flags & GD_FLG_DEVINIT) {
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
*
* Startup Code (reset vector)
*
- * do important init only if we don't start from memory!
+ * do important init only if we don't start from RAM!
* relocate armboot to ram
* setup stack
* jump to second stage
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ add r0, r0, #4 /* start at first byte of bss */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+
ldr pc, _start_armboot
_start_armboot: .word start_armboot
/*
* before relocating, we have to setup RAM timing
- * because memory timing is board-dependend, you will
+ * because memory timing is board-dependent, you will
* find a memsetup.S in your board directory.
*/
mov ip, lr
stmia sp, {r0 - r12} @ Calling r0-r12
add r8, sp, #S_PC
- ldr r2, _armboot_end
- add r2, r2, #CONFIG_STACKSIZE
- sub r2, r2, #8
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ setup our mode stack
- add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
- sub r13, r13, #8
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ add r0, r0, #4 /* start at first byte of bss */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+
#if 0
/* try doing this stuff after the relocation */
ldr r0, =pWTCON
.macro bad_save_user_regs
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Calling r0-r12
- ldr r2, _armboot_end
- add r2, r2, #CONFIG_STACKSIZE
- sub r2, r2, #8
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r3} @ get pc, cpsr
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ setup our mode stack
- add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
- sub r13, r13, #8
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ add r0, r0, #4 /* start at first byte of bss */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+
ldr pc, _start_armboot
_start_armboot: .word start_armboot
sub sp, sp, #S_FRAME_SIZE @ carve out a frame on current user stack
stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
- ldr r2, _armboot_end @ find top of stack
- add r2, r2, #CONFIG_STACKSIZE @ find base of normal stack
- sub r2, r2, #8 @ set base 2 words into abort stack
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
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
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ get bottom of stack (into sp by by user stack pointer).
- add r13, r13, #CONFIG_STACKSIZE @ head to reserved words at the top of the stack
- sub r13, r13, #8 @ reserved a couple spots in abort stack
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr in position 0 of saved stack
mrs lr, spsr @ get the spsr
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ add r0, r0, #4 /* start at first byte of bss */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+
ldr pc, _start_armboot
_start_armboot:
@ carve out a frame on current user stack
sub sp, sp, #S_FRAME_SIZE
stmia sp, {r0 - r12} @ Save user registers (now in svc mode) r0-r12
- ldr r2, _armboot_end @ find top of stack
- add r2, r2, #CONFIG_STACKSIZE @ find base of normal stack
- sub r2, r2, #8 @ set base 2 words into abort stack
+
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
@ get values for "aborted" pc and cpsr (into parm regs)
ldmia r2, {r2 - r3}
add r0, sp, #S_FRAME_SIZE @ grab pointer to old stack
.endm
.macro get_bad_stack
- @ get bottom of stack (into sp by by user stack pointer).
- ldr r13, _armboot_end
- @ head to reserved words at the top of the stack
- add r13, r13, #CONFIG_STACKSIZE
- sub r13, r13, #8 @ reserved a couple spots in abort stack
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr in position 0 of saved stack
mrs lr, spsr @ get the spsr
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-/*
- * Note: armboot_end is defined by the (board-dependent) linker script
- */
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ add r0, r0, #4 /* start at first byte of bss */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+
ldr pc,_start_armboot
_start_armboot: .word start_armboot
stmia sp, {r0 - r12} @ Calling r0-r12
add r8, sp, #S_PC
- ldr r2, _armboot_end
- add r2, r2, #CONFIG_STACKSIZE
- sub r2, r2, #8
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ setup our mode stack
- add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
- sub r13, r13, #8
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
int cpu_init (void)
{
/*
- * setup up stack if necessary
+ * setup up stacks if necessary
*/
-/*
-
- FIXME: the stack is _below_ the uboot code!!
-
#ifdef CONFIG_USE_IRQ
- IRQ_STACK_START = _armboot_end +
- CONFIG_STACKSIZE + CONFIG_STACKSIZE_IRQ - 4;
- FIQ_STACK_START = IRQ_STACK_START + CONFIG_STACKSIZE_FIQ;
- _armboot_real_end = FIQ_STACK_START + 4;
-#else
- _armboot_real_end = _armboot_end + CONFIG_STACKSIZE;
+ DECLARE_GLOBAL_DATA_PTR;
+
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
+ FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
-*/
- pci_init();
+
+ pci_init();
return 0;
}
{
extern void reset_cpu (ulong addr);
- printf ("reseting ...\n");
+ printf ("resetting ...\n");
udelay (50000); /* wait 50 ms */
disable_interrupts ();
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
- */
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
-
-/*
- * This is defined in the board specific linker script
+ * These are defined in the board-specific linker script.
*/
.globl _bss_start
_bss_start:
- .word bss_start
+ .word __bss_start
.globl _bss_end
_bss_end:
- .word bss_end
-
-/*
- * _armboot_real_end is the first usable RAM address behind armboot
- * and the various stacks
- */
-.globl _armboot_real_end
-_armboot_real_end:
- .word 0x0badc0de
-
-/*
- * We relocate uboot to this address (end of RAM - 128 KiB)
- */
-.globl _uboot_reloc
-_uboot_reloc:
- .word TEXT_BASE
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
ble copy_loop
/* Set up the stack */
-
stack_setup:
-
- ldr r0, _uboot_reloc /* upper 128 KiB: relocated uboot */
- sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
- /* FIXME: bdinfo should be here */
+ ldr r0, _TEXT_BASE /* upper 128 KiB: relocated uboot */
+ sub r0, r0, #CFG_MALLOC_LEN /* malloc area */
+ sub r0, r0, #CFG_GBL_DATA_SIZE /* bdinfo */
+#ifdef CONFIG_USE_IRQ
+ sub r0, r0, #(CONFIG_STACKSIZE_IRQ+CONFIG_STACKSIZE_FIQ)
+#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
clear_bss:
-
ldr r0, _bss_start /* find start of bss segment */
add r0, r0, #4 /* start at first byte of bss */
ldr r1, _bss_end /* stop here */
cmp r0, r1
bne clbss_l
-
ldr pc, _start_armboot
_start_armboot: .word start_armboot
stmia sp, {r0 - r12} /* Calling r0-r12 */
add r8, sp, #S_PC
- ldr r2, _armboot_end
- add r2, r2, #CONFIG_STACKSIZE
- sub r2, r2, #8
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r4} /* get pc, cpsr, old_r0 */
add r0, sp, #S_FRAME_SIZE /* restore sp_SVC */
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ setup our mode stack
- add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
- sub r13, r13, #8
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
- */
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
-
-/*
- * This is defined in the board specific linker script
+ * These are defined in the board-specific linker script.
*/
.globl _bss_start
_bss_start:
- .word bss_start
+ .word __bss_start
.globl _bss_end
_bss_end:
- .word bss_end
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
sub sp, r0, #12 /* leave 3 words for abort-stack */
clear_bss:
-
ldr r0, _bss_start /* find start of bss segment */
add r0, r0, #4 /* start at first byte of bss */
ldr r1, _bss_end /* stop here */
cmp r0, r1
bne clbss_l
-
ldr pc, _start_armboot
_start_armboot: .word start_armboot
stmia sp, {r0 - r12} /* Calling r0-r12 */
add r8, sp, #S_PC
- ldr r2, _armboot_end
- add r2, r2, #CONFIG_STACKSIZE
- sub r2, r2, #8
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r4} /* get pc, cpsr, old_r0 */
add r0, sp, #S_FRAME_SIZE /* restore sp_SVC */
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ setup our mode stack
- add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
- sub r13, r13, #8
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
#ifdef CONFIG_USE_IRQ
DECLARE_GLOBAL_DATA_PTR;
- IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_LEN - 4;
+ IRQ_STACK_START = _armboot_start - CFG_MALLOC_LEN - CFG_GBL_DATA_SIZE - 4;
FIQ_STACK_START = IRQ_STACK_START - CONFIG_STACKSIZE_IRQ;
#endif
return 0;
.word _start
/*
- * Note: _armboot_end_data and _armboot_end are defined
- * by the (board-dependent) linker script.
- * _armboot_end_data is the first usable FLASH address after armboot
+ * These are defined in the board-specific linker script.
*/
-.globl _armboot_end_data
-_armboot_end_data:
- .word armboot_end_data
-.globl _armboot_end
-_armboot_end:
- .word armboot_end
+.globl _bss_start
+_bss_start:
+ .word __bss_start
+
+.globl _bss_end
+_bss_end:
+ .word _end
#ifdef CONFIG_USE_IRQ
/* IRQ stack memory (calculated at run-time) */
beq stack_setup
ldr r2, _armboot_start
- ldr r3, _armboot_end
+ ldr r3, _bss_start
sub r2, r3, r2 /* r2 <- size of armboot */
add r2, r0, r2 /* r2 <- source end address */
#endif
sub sp, r0, #12 /* leave 3 words for abort-stack */
+clear_bss:
+ ldr r0, _bss_start /* find start of bss segment */
+ add r0, r0, #4 /* start at first byte of bss */
+ ldr r1, _bss_end /* stop here */
+ mov r2, #0x00000000 /* clear */
+
+clbss_l:str r2, [r0] /* clear loop... */
+ add r0, r0, #4
+ cmp r0, r1
+ bne clbss_l
+
ldr pc, _start_armboot
_start_armboot: .word start_armboot
stmia sp, {r0 - r12} @ Calling r0-r12
add r8, sp, #S_PC
- ldr r2, _armboot_end
- add r2, r2, #CONFIG_STACKSIZE
- sub r2, r2, #8
+ ldr r2, _armboot_start
+ sub r2, r2, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r2, r2, #(CFG_GBL_DATA_SIZE+8) @ set base 2 words into abort stack
ldmia r2, {r2 - r4} @ get pc, cpsr, old_r0
add r0, sp, #S_FRAME_SIZE @ restore sp_SVC
.endm
.macro get_bad_stack
- ldr r13, _armboot_end @ setup our mode stack
- add r13, r13, #CONFIG_STACKSIZE @ resides at top of normal stack
- sub r13, r13, #8
+ ldr r13, _armboot_start @ setup our mode stack
+ sub r13, r13, #(CONFIG_STACKSIZE+CFG_MALLOC_LEN)
+ sub r13, r13, #(CFG_GBL_DATA_SIZE+8) @ reserved a couple spots in abort stack
str lr, [r13] @ save caller lr / spsr
mrs lr, spsr
Furthermore, the startup code (cpu/<arm>/start.S) internally uses
another variable (_TEXT_BASE) with the same content as _armboot_start.
I agree that this mess should be cleaned up.
-
-_armboot_end_data is the end address of the initialized data section,
-and is only used in one place (board/logodl/flash.c - the reference in
-lib_arm/board.c is purely informational).
-
-_armboot_end is the end address of the BSS and is used to determine
-the address of the VFD buffer.
-
-Eliminating those should be doable, and at least the patch already
-eliminates _armboot_real_end.
/* for the following variables, see start.S */
extern ulong _armboot_start; /* code start */
-extern ulong _armboot_end_data; /* code + data end */
-extern ulong _armboot_end; /* BSS end */
+extern ulong _bss_start; /* code + data end == BSS start */
+extern ulong _bss_end; /* BSS end */
extern ulong IRQ_STACK_START; /* top of IRQ stack */
extern ulong FIQ_STACK_START; /* top of FIQ stack */
0x0343, 0x0454, 0x0565, 0x0565, 0x0676, 0x0787, 0x0898, 0x0999,
0x0AAA, 0x0ABA, 0x0BCB, 0x0CCC, 0x0DDD, 0x0EEE, 0x0FFF, 0x0FB3,
0x0FB4, 0x0FC4, 0x0FC5, 0x0FC6, 0x0FD7, 0x0FD8, 0x0FD9, 0x0FDA,
- 0x0FEA, 0x0FEB, 0x0FEC, 0x0FFD, 0x0FFE, 0x0FFF, 0x0FFF,
+ 0x0FEA, 0x0FEB, 0x0FEC, 0x0FFD, 0x0FFE, 0x0FFF, 0x0FFF,
};
unsigned char bmp_logo_bitmap[] = {
*/
/*
- * Size of malloc() pool; this lives below the uppermost 128 KiB which are
- * used for the RAM copy of the uboot code
- *
+ * Size of malloc() pool
*/
#define CFG_MALLOC_LEN (256*1024)
#define CFG_GBL_DATA_SIZE 128 /* size in bytes reserved for initial data */
* Size of malloc() pool
*/
#define CFG_MALLOC_LEN (CFG_ENV_SIZE + 128*1024)
+#define CFG_GBL_DATA_SIZE 128 /* size in bytes reserved for initial data */
/* allow to overwrite serial and ethaddr */
#define CONFIG_ENV_OVERWRITE
#define CFG_ENV_SIZE 0x4000
#define CFG_ENV_SECT_SIZE 0x20000
#else
-#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x4000)
+#define CFG_ENV_ADDR (CFG_FLASH_BASE + 0x8000)
#define CFG_ENV_SIZE 0x4000
#define CFG_ENV_SECT_SIZE 0x4000
#endif
#define INTEL_ID_28F640C3T 0x88CC88CC /* 64M = 4M x 16 top boot sector */
#define INTEL_ID_28F640C3B 0x88CD88CD /* 64M = 4M x 16 bottom boot sector */
-#define INTEL_ID_28F128J3 0x89189818 /* 16M = 8M x 16 x 128 */
+#define INTEL_ID_28F128J3 0x89188918 /* 16M = 8M x 16 x 128 */
#define INTEL_ID_28F320J5 0x00140014 /* 32M = 128K x 32 */
#define INTEL_ID_28F640J5 0x00150015 /* 64M = 128K x 64 */
#define INTEL_ID_28F320J3A 0x00160016 /* 32M = 128K x 32 */
{
printf ("\n\n%s\n\n", version_string);
printf ("U-Boot code: %08lX -> %08lX BSS: -> %08lX\n",
- _armboot_start, _armboot_end_data, _armboot_end);
+ _armboot_start, _bss_start, _bss_end);
#ifdef CONFIG_MODEM_SUPPORT
puts ("Modem Support enabled\n");
#endif
* 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
+ * mess of board dependent #ifdef'ed code we now make the whole
* initialization sequence configurable to the user.
*
* The requirements for any new initalization function is simple: it
gd->bd = (bd_t*)((char*)gd - sizeof(bd_t));
memset (gd->bd, 0, sizeof (bd_t));
- monitor_flash_len = _armboot_end_data - _armboot_start;
+ monitor_flash_len = _bss_start - _armboot_start;
for (init_fnc_ptr = init_sequence; *init_fnc_ptr; ++init_fnc_ptr) {
if ((*init_fnc_ptr)() != 0) {
* reserve memory for VFD display (always full pages)
*/
/* armboot_end is defined in the board-specific linker script */
- addr = (_armboot_end + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
+ addr = (_bss_start + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
size = vfd_setmem (addr);
gd->fb_base = addr;
#endif /* CONFIG_VFD */
projects / u-boot.git / commitdiff