diff options
Diffstat (limited to 'src/arch/arm')
| -rw-r--r-- | src/arch/arm/Makefile.inc | 10 | ||||
| -rw-r--r-- | src/arch/arm/armv7/Makefile.inc | 10 | ||||
| -rw-r--r-- | src/arch/arm/armv7/bootblock.S | 23 | ||||
| -rw-r--r-- | src/arch/arm/include/arch/asm.h | 19 | ||||
| -rw-r--r-- | src/arch/arm/libgcc/bpabi.c | 214 | ||||
| -rw-r--r-- | src/arch/arm/libgcc/bpabi_asm.S | 130 | ||||
| -rw-r--r-- | src/arch/arm/libgcc/uldivmod.S | 28 |
7 files changed, 53 insertions, 381 deletions
diff --git a/src/arch/arm/Makefile.inc b/src/arch/arm/Makefile.inc index 8044dba598..95e16b501d 100644 --- a/src/arch/arm/Makefile.inc +++ b/src/arch/arm/Makefile.inc @@ -66,7 +66,7 @@ $(objcbfs)/bootblock.debug: $(src)/arch/arm/bootblock.ld $(obj)/ldoptions $$(boo ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y) $(LD_bootblock) -m armelf_linux_eabi --gc-sections -static -o $@ -L$(obj) $< -T $(src)/arch/arm/bootblock.ld else - $(CC_bootblock) $(CFLAGS_bootblock) -nostartfiles -Wl,--gc-sections -static -o $@ -L$(obj) -T $(src)/arch/arm/bootblock.ld -Wl,--start-group $(bootblock-objs) -Wl,--end-group + $(CC_bootblock) $(CFLAGS_bootblock) -nostdlib -Wl,--gc-sections -static -o $@ -L$(obj) -T $(src)/arch/arm/bootblock.ld -Wl,--start-group $(bootblock-objs) -Wl,--end-group endif endif # CONFIG_ARCH_BOOTBLOCK_ARM @@ -89,9 +89,9 @@ VBOOT_STUB_DEPS += $(obj)/arch/arm/eabi_compat.rmodules_arm.o $(objcbfs)/romstage.debug: $$(romstage-objs) $(src)/arch/arm/romstage.ld $(obj)/ldoptions @printf " LINK $(subst $(obj)/,,$(@))\n" ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y) - $(LD_romstage) -nostdlib -nostartfiles --gc-sections -static -o $@ -L$(obj) $(romstage-objs) -T $(src)/arch/arm/romstage.ld + $(LD_romstage) -nostdlib --gc-sections -static -o $@ -L$(obj) $(romstage-objs) -T $(src)/arch/arm/romstage.ld else - $(CC_romstage) $(CFLAGS_romstage) -nostartfiles -Wl,--gc-sections -static -o $@ -L$(obj) -T $(src)/arch/arm/romstage.ld -Wl,--start-group $(romstage-objs) -Wl,--end-group + $(CC_romstage) $(CFLAGS_romstage) -nostdlib -Wl,--gc-sections -static -o $@ -L$(obj) -T $(src)/arch/arm/romstage.ld -Wl,--start-group $(romstage-objs) -Wl,--end-group endif endif # CONFIG_ARCH_ROMSTAGE_ARM @@ -116,7 +116,7 @@ ramstage-srcs += $(wildcard src/mainboard/$(MAINBOARDDIR)/mainboard.c) $(objcbfs)/ramstage.debug: $$(ramstage-objs) $(src)/arch/arm/ramstage.ld $(obj)/ldoptions @printf " CC $(subst $(obj)/,,$(@))\n" ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y) - $(LD_ramstage) -m armelf_linux_eabi --gc-sections -o $@ -L$(obj) $< -T $(src)/arch/arm/ramstage.ld + $(LD_ramstage) -nostdlib -m armelf_linux_eabi --gc-sections -o $@ -L$(obj) $< -T $(src)/arch/arm/ramstage.ld else $(CC_ramstage) $(CFLAGS_ramstage) -nostdlib -Wl,--gc-sections -static -o $@ -L$(obj) -Wl,--start-group $(ramstage-objs) -Wl,--end-group -T $(src)/arch/arm/ramstage.ld endif @@ -124,7 +124,7 @@ endif $(objgenerated)/ramstage.o: $(stages_o) $$(ramstage-objs) @printf " CC $(subst $(obj)/,,$(@))\n" ifeq ($(CONFIG_COMPILER_LLVM_CLANG),y) - $(LD_ramstage) -m -m armelf_linux_eabi --gc-sections -r -o $@ --wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3 --wrap __uidiv --start-group $(ramstage-objs) --end-group + $(LD_ramstage) -nostdlib -m armelf_linux_eabi --gc-sections -r -o $@ --wrap __divdi3 --wrap __udivdi3 --wrap __moddi3 --wrap __umoddi3 --wrap __uidiv --start-group $(ramstage-objs) --end-group else $(CC_ramstage) $(CFLAGS_ramstage) $(CPPFLAGS_ramstage) -nostdlib -Wl,--gc-sections -r -o $@ -Wl,--start-group $(stages_o) $(ramstage-objs) -Wl,--end-group endif diff --git a/src/arch/arm/armv7/Makefile.inc b/src/arch/arm/armv7/Makefile.inc index 4f3e75789c..01069c4462 100644 --- a/src/arch/arm/armv7/Makefile.inc +++ b/src/arch/arm/armv7/Makefile.inc @@ -19,8 +19,10 @@ ## ############################################################################### -armv7_flags = -march=armv7-a -mthumb -mthumb-interwork \ +armv7_flags = -march=armv7-a -mthumb \ -I$(src)/arch/arm/include/armv7/ -D__COREBOOT_ARM_ARCH__=7 +armv7_asm_flags = $(armv7_flags) -Wa,-mthumb -Wa,-mimplicit-it=always \ + -Wa,-mno-warn-deprecated ############################################################################### # bootblock @@ -40,7 +42,7 @@ bootblock-$(CONFIG_BOOTBLOCK_CONSOLE) += exception_asm.S bootblock-y += mmu.c bootblock-c-ccopts += $(armv7_flags) -bootblock-S-ccopts += $(armv7_flags) +bootblock-S-ccopts += $(armv7_asm_flags) endif # CONFIG_ARCH_BOOTBLOCK_ARMV7 @@ -57,7 +59,7 @@ romstage-y += exception_asm.S romstage-y += mmu.c romstage-c-ccopts += $(armv7_flags) -romstage-S-ccopts += $(armv7_flags) +romstage-S-ccopts += $(armv7_asm_flags) endif # CONFIG_ARCH_ROMSTAGE_ARMV7 @@ -74,6 +76,6 @@ ramstage-y += exception_asm.S ramstage-y += mmu.c ramstage-c-ccopts += $(armv7_flags) -ramstage-S-ccopts += $(armv7_flags) +ramstage-S-ccopts += $(armv7_asm_flags) endif # CONFIG_ARCH_RAMSTAGE_ARMV7 diff --git a/src/arch/arm/armv7/bootblock.S b/src/arch/arm/armv7/bootblock.S index a8d0973034..4258caf439 100644 --- a/src/arch/arm/armv7/bootblock.S +++ b/src/arch/arm/armv7/bootblock.S @@ -32,6 +32,7 @@ #include <arch/asm.h> .section ".start", "a", %progbits +.arm ENTRY(_start) /* * Set the cpu to System mode with IRQ and FIQ disabled. Prefetch/Data @@ -40,7 +41,11 @@ ENTRY(_start) * causes it. */ msr cpsr_cxf, #0xdf + bl _thumb_start +ENDPROC(_start) +.thumb +ENTRY(_thumb_start) /* * From Cortex-A Series Programmer's Guide: * Only CPU 0 performs initialization. Other CPUs go into WFI @@ -72,25 +77,17 @@ call_bootblock: ldr sp, .Stack /* Set up stack pointer */ ldr r0,=0x00000000 /* - * The current design of cpu_info places the - * struct at the top of the stack. The number of - * words pushed must be at least as large as that - * struct. + * The current design of cpu_info places the struct at the top of the + * stack. Free enough space to accomodate for that, but make sure it's + * 8-byte aligned for ABI compliance. */ - push {r0-r2} - bic sp, sp, #7 /* 8-byte alignment for ABI compliance */ - /* - * Use "bl" instead of "b" even though we do not intend to return. - * "bl" gets compiled to "blx" if we're transitioning from ARM to - * Thumb. However, "b" will not and GCC may attempt to create a - * wrapper which is currently broken. - */ + sub sp, sp, #16 bl main wait_for_interrupt: wfi mov pc, lr @ back to my caller -ENDPROC(_start) +ENDPROC(_thumb_start) /* we do it this way because it's a 32-bit constant and * in some cases too far away to be loaded as just an offset diff --git a/src/arch/arm/include/arch/asm.h b/src/arch/arm/include/arch/asm.h index 5f3e55f135..a57ce4dafa 100644 --- a/src/arch/arm/include/arch/asm.h +++ b/src/arch/arm/include/arch/asm.h @@ -20,19 +20,20 @@ #ifndef __ARM_ASM_H #define __ARM_ASM_H -#if defined __arm__ -# define ARM(x...) x -# define THUMB(x...) -# define W(instr) instr -#elif defined __thumb__ +/* __arm__ is defined regardless of Thumb mode, so need to order this right */ +#if defined __thumb2__ # define ARM(x...) # define THUMB(x...) x # define W(instr) instr.w # if __COREBOOT_ARM_ARCH__ < 7 # error thumb mode has not been tested with ARM < v7! # endif +#elif defined __thumb__ +# error You are not compiling Thumb2, this won't work! #else -# error Not in ARM or thumb mode! +# define ARM(x...) x +# define THUMB(x...) +# define W(instr) instr #endif #define ALIGN .align 0 @@ -49,4 +50,10 @@ #define END(name) \ .size name, .-name +/* Everything should go into the text section by default. */ + .text + +/* Thumb code uses the (new) unified assembly syntax. */ +THUMB( .syntax unified ) + #endif /* __ARM_ASM_H */ diff --git a/src/arch/arm/libgcc/bpabi.c b/src/arch/arm/libgcc/bpabi.c deleted file mode 100644 index 8cb7ddf129..0000000000 --- a/src/arch/arm/libgcc/bpabi.c +++ /dev/null @@ -1,214 +0,0 @@ -/* Miscellaneous BPABI functions. - - Copyright (C) 2003, 2004 Free Software Foundation, Inc. - Contributed by CodeSourcery, LLC. - - This file 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, or (at your option) any - later version. - - In addition to the permissions in the GNU General Public License, the - Free Software Foundation gives you unlimited permission to link the - compiled version of this file into combinations with other programs, - and to distribute those combinations without any restriction coming - from the use of this file. (The General Public License restrictions - do apply in other respects; for example, they cover modification of - the file, and distribution when not linked into a combine - executable.) - - This file 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; see the file COPYING. If not, write to - the Free Software Foundation, 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ - -#if defined __GNUC__ - -#include <stdint.h> - -uint64_t __udivmoddi4(uint64_t n, uint64_t d, uint64_t *rp); -extern int64_t __divdi3(int64_t, int64_t); -extern uint64_t __udivdi3(uint64_t, uint64_t); -extern int64_t __gnu_ldivmod_helper(int64_t, int64_t, int64_t *); -extern uint64_t __gnu_uldivmod_helper(uint64_t, uint64_t, uint64_t *); - -typedef union -{ - struct { - int32_t low; - int32_t high; - } s; - int64_t ll; -} DWunion; - -uint64_t -__udivmoddi4(uint64_t n, uint64_t d, uint64_t *rp) -{ - const DWunion nn = {.ll = n}; - const DWunion dd = {.ll = d}; - DWunion rr; - uint32_t d0, d1, n0, n1, n2; - uint32_t q0, q1; - uint32_t b, bm; - - d0 = dd.s.low; - d1 = dd.s.high; - n0 = nn.s.low; - n1 = nn.s.high; - - if (d1 == 0) { - if (d0 > n1) { - /* 0q = nn / 0D */ - udiv_qrnnd(q0, n0, n1, n0, d0); - q1 = 0; - /* Remainder in n0. */ - } else { - /* qq = NN / 0d */ - if (d0 == 0) - d0 = 1 / d0; /* Divide intentionally by zero. */ - - udiv_qrnnd(q1, n1, 0, n1, d0); - udiv_qrnnd(q0, n0, n1, n0, d0); - - /* Remainder in n0. */ - } - - if (rp != 0) { - rr.s.low = n0; - rr.s.high = 0; - *rp = rr.ll; - } - } else { - if (d1 > n1) { - /* 00 = nn / DD */ - q0 = 0; - q1 = 0; - - /* Remainder in n1n0. */ - if (rp != 0) { - rr.s.low = n0; - rr.s.high = n1; - *rp = rr.ll; - } - } else { - /* 0q = NN / dd */ - - count_leading_zeros(bm, d1); - if (bm == 0) { - /* From (n1 >= d1) /\ (the most significant - bit of d1 is set), conclude (the most - significant bit of n1 is set) /\ (the - quotient digit q0 = 0 or 1). - - This special case is necessary, not an - optimization. */ - - /* The condition on the next line takes - advantage of that n1 >= d1 (true due to - program flow). */ - if (n1 > d1 || n0 >= d0) { - q0 = 1; - sub_ddmmss(n1, n0, n1, n0, d1, d0); - } else - q0 = 0; - - q1 = 0; - - if (rp != 0) { - rr.s.low = n0; - rr.s.high = n1; - *rp = rr.ll; - } - } else { - uint32_t m1, m0; - /* Normalize. */ - - b = 32 - bm; - - d1 = (d1 << bm) | (d0 >> b); - d0 = d0 << bm; - n2 = n1 >> b; - n1 = (n1 << bm) | (n0 >> b); - n0 = n0 << bm; - - udiv_qrnnd(q0, n1, n2, n1, d1); - umul_ppmm(m1, m0, q0, d0); - - if (m1 > n1 || (m1 == n1 && m0 > n0)) { - q0--; - sub_ddmmss(m1, m0, m1, m0, d1, d0); - } - - q1 = 0; - - /* Remainder in (n1n0 - m1m0) >> bm. */ - if (rp != 0) { - sub_ddmmss(n1, n0, n1, n0, m1, m0); - rr.s.low = (n1 << b) | (n0 >> bm); - rr.s.high = n1 >> bm; - *rp = rr.ll; - } - } - } - } - - const DWunion ww = {{.low = q0, .high = q1}}; - return ww.ll; -} - -int64_t -__divdi3(int64_t u, int64_t v) -{ - int32_t c = 0; - DWunion uu = {.ll = u}; - DWunion vv = {.ll = v}; - int64_t w; - - if (uu.s.high < 0) { - c = ~c; - uu.ll = -uu.ll; - } - if (vv.s.high < 0) { - c = ~c; - vv.ll = -vv.ll; - } - - w = __udivmoddi4(uu.ll, vv.ll, (uint64_t *)0); - if (c) - w = -w; - - return w; -} - -int64_t -__gnu_ldivmod_helper (int64_t a, int64_t b, int64_t *remainder) -{ - int64_t quotient; - - quotient = __divdi3(a, b); - *remainder = a - b * quotient; - return quotient; -} - -uint64_t -__udivdi3(uint64_t n, uint64_t d) -{ - return __udivmoddi4(n, d, (uint64_t *)0); -} - -uint64_t -__gnu_uldivmod_helper(uint64_t a, uint64_t b, uint64_t *remainder) -{ - uint64_t quotient; - - quotient = __udivdi3(a, b); - *remainder = a - b * quotient; - return quotient; -} - -#endif diff --git a/src/arch/arm/libgcc/bpabi_asm.S b/src/arch/arm/libgcc/bpabi_asm.S deleted file mode 100644 index 27b4a1cfe8..0000000000 --- a/src/arch/arm/libgcc/bpabi_asm.S +++ /dev/null @@ -1,130 +0,0 @@ -/* Miscellaneous BPABI functions. - - Copyright (C) 2003, 2004, 2007, 2008 Free Software Foundation, Inc. - Contributed by CodeSourcery, LLC. - - This file 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, or (at your option) any - later version. - - In addition to the permissions in the GNU General Public License, the - Free Software Foundation gives you unlimited permission to link the - compiled version of this file into combinations with other programs, - and to distribute those combinations without any restriction coming - from the use of this file. (The General Public License restrictions - do apply in other respects; for example, they cover modification of - the file, and distribution when not linked into a combine - executable.) - - This file 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; see the file COPYING. If not, write to - the Free Software Foundation, 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ - - -#include <arch/asm.h> - -#ifdef __ARMEB__ -#define xxh r0 -#define xxl r1 -#define yyh r2 -#define yyl r3 -#else -#define xxh r1 -#define xxl r0 -#define yyh r3 -#define yyl r2 -#endif - -#if defined __thumb2__ - -.macro do_it cond - it \cond -.endm -#define do_push push -#define do_pop pop - -#else - -.macro do_it cond -.endm -#define do_push stmfd sp!, -#define do_pop ldmfd sp!, - -#endif - -ENTRY(__aeabi_lcmp) - - cmp xxh, yyh - do_it lt - movlt r0, #-1 - do_it gt - movgt r0, #1 - do_it ne - movne pc, lr - subs r0, xxl, yyl - do_it lo - movlo r0, #-1 - do_it hi - movhi r0, #1 - mov pc, lr - -ENDPROC(__aeabi_lcmp) - -ENTRY(__aeabi_ulcmp) - - cmp xxh, yyh - do_it lo - movlo r0, #-1 - do_it hi - movhi r0, #1 - do_it ne - movne pc, lr - cmp xxl, yyl - do_it lo - movlo r0, #-1 - do_it hi - movhi r0, #1 - do_it eq - moveq r0, #0 - mov pc, lr - -ENDPROC(__aeabi_ulcmp) - -ENTRY(__aeabi_ldivmod) - sub sp, sp, #8 -#if defined(__thumb2__) - mov ip, sp - push {ip, lr} -#else - do_push {sp, lr} -#endif - bl __gnu_ldivmod_helper - ldr lr, [sp, #4] - add sp, sp, #8 - do_pop {r2, r3} - mov pc, lr - -ENDPROC(__aeabi_ldivmod) - -ENTRY(__aeabi_uldivmod) - sub sp, sp, #8 -#if defined(__thumb2__) - mov ip, sp - push {ip, lr} -#else - do_push {sp, lr} -#endif - bl __gnu_uldivmod_helper - ldr lr, [sp, #4] - add sp, sp, #8 - do_pop {r2, r3} - mov pc, lr - -ENDPROC(__aeabi_uldivmod) diff --git a/src/arch/arm/libgcc/uldivmod.S b/src/arch/arm/libgcc/uldivmod.S index ac267d006e..521a5d1e33 100644 --- a/src/arch/arm/libgcc/uldivmod.S +++ b/src/arch/arm/libgcc/uldivmod.S @@ -55,8 +55,12 @@ Q_1 .req r1 R_0 .req r2 R_1 .req r3 +THUMB( +TMP .req r8 +) + ENTRY(__aeabi_uldivmod) - stmfd sp!, {r4, r5, r6, r7, lr} + stmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) lr} @ Test if B == 0 orrs ip, B_0, B_1 @ Z set -> B == 0 beq L_div_by_0 @@ -92,12 +96,16 @@ L_div_64_64: subs D_1, D_0, #32 rsb ip, D_0, #32 movmi B_1, B_1, lsl D_0 - orrmi B_1, B_1, B_0, lsr ip +ARM( orrmi B_1, B_1, B_0, lsr ip ) +THUMB( lsrmi TMP, B_0, ip ) +THUMB( orrmi B_1, B_1, TMP ) movpl B_1, B_0, lsl D_1 mov B_0, B_0, lsl D_0 @ C = 1 << (clz B - clz A) movmi C_1, C_1, lsl D_0 - orrmi C_1, C_1, C_0, lsr ip +ARM( orrmi C_1, C_1, C_0, lsr ip ) +THUMB( lsrmi TMP, C_0, ip ) +THUMB( orrmi C_1, C_1, TMP ) movpl C_1, C_0, lsl D_1 mov C_0, C_0, lsl D_0 L_done_shift: @@ -170,7 +178,7 @@ L_exit: mov R_1, A_1 mov Q_0, D_0 mov Q_1, D_1 - ldmfd sp!, {r4, r5, r6, r7, pc} + ldmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) pc} L_div_32_32: @ Note: A_0 & r0 are aliases @@ -180,7 +188,7 @@ L_div_32_32: mov R_0, r1 mov R_1, #0 mov Q_1, #0 - ldmfd sp!, {r4, r5, r6, r7, pc} + ldmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) pc} L_pow2: /* CLZ only exists in ARM architecture version 5 and above. */ @@ -201,12 +209,14 @@ L_pow2: add D_0, D_0, #32 L_1: movpl A_0, A_0, lsr D_0 - orrpl A_0, A_0, A_1, lsl D_1 +ARM( orrpl A_0, A_0, A_1, lsl D_1 ) +THUMB( lslpl TMP, A_1, D_1 ) +THUMB( orrpl A_0, A_0, TMP ) mov A_1, A_1, lsr D_0 @ Mov back C to R mov R_0, C_0 mov R_1, C_1 - ldmfd sp!, {r4, r5, r6, r7, pc} + ldmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) pc} #else @ Note: A, B and Q, R are aliases @ R = A & (B - 1) @@ -244,7 +254,7 @@ L_1: @ Move C to R mov R_0, C_0 mov R_1, C_1 - ldmfd sp!, {r4, r5, r6, r7, pc} + ldmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) pc} #endif L_div_by_0: @@ -254,5 +264,5 @@ L_div_by_0: mov Q_1, #0 mov R_0, #0 mov R_1, #0 - ldmfd sp!, {r4, r5, r6, r7, pc} + ldmfd sp!, {r4, r5, r6, r7, THUMB(TMP,) pc} ENDPROC(__aeabi_uldivmod) |