mirrors/u-boot
0
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2024-12-04 18:13:31 +08:00
Code Issues Packages Projects Releases Wiki Activity
f81649586d
u-boot/examples/api/crt0.S

79 lines
1.0 KiB
ArmAsm
Raw Normal View History

SPDX: Convert all of our single license tags to Linux Kernel style When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-05-07 05:58:06 +08:00
/* SPDX-License-Identifier: GPL-2.0+ */
API for external applications. This is an API for external (standalone) applications running on top of U-Boot, and is meant to be more extensible and robust than the existing jumptable mechanism. It is similar to UNIX syscall approach. See api/README for more details. Included is the demo application using this new framework (api_examples). Please note this is still an experimental feature, and is turned off by default. Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2008-01-10 02:39:36 +08:00
/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*/
#if defined(CONFIG_PPC)
.text
.globl _start
_start:
API: Use stack pointer as API signature search hint in the glue layer. De-hardcode range in RAM we search for the API signature. Instead use the stack pointer as a hint to narrow down the range in which the signature could reside (it is malloc'ed on the U-Boot heap, and is hoped to remain in some proximity from stack area). Adjust PowerPC code in API demo to the new scheme. Signed-off-by: Rafal Czubak <rcz@semihalf.com> Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2009-01-23 20:27:15 +08:00
lis %r11, search_hint@ha
addi %r11, %r11, search_hint@l
stw %r1, 0(%r11)
API for external applications. This is an API for external (standalone) applications running on top of U-Boot, and is meant to be more extensible and robust than the existing jumptable mechanism. It is similar to UNIX syscall approach. See api/README for more details. Included is the demo application using this new framework (api_examples). Please note this is still an experimental feature, and is turned off by default. Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2008-01-10 02:39:36 +08:00
b main
.globl syscall
syscall:
lis %r11, syscall_ptr@ha
addi %r11, %r11, syscall_ptr@l
lwz %r11, 0(%r11)
mtctr %r11
bctr
API: Provide syscall entry point for the ARM architecture. Signed-off-by: Rafal Czubak <rcz@semihalf.com> Acked-by: Rafal Jaworowski <raj@semihalf.com>
2009-01-23 20:27:16 +08:00
#elif defined(CONFIG_ARM)
.text
.globl _start
_start:
ldr ip, =search_hint
str sp, [ip]
b main
.globl syscall
syscall:
ldr ip, =syscall_ptr
ldr pc, [ip]
api: Add FreeBSD API support for MIPS platforms This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms. Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-04 18:13:44 +08:00
#elif defined(CONFIG_MIPS)
Fix FreeBSD loader API so that it works on both 32-bit and 64-bit targets. Specifically tested on MIPS under QEMU (works with all combination of bit-ness and endian-ness) Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-17 21:23:31 +08:00
#include <asm/asm.h>
api: Add FreeBSD API support for MIPS platforms This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms. Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-04 18:13:44 +08:00
.text
.globl __start
.ent __start
__start:
Fix FreeBSD loader API so that it works on both 32-bit and 64-bit targets. Specifically tested on MIPS under QEMU (works with all combination of bit-ness and endian-ness) Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-17 21:23:31 +08:00
PTR_S $sp, search_hint
api: Add FreeBSD API support for MIPS platforms This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms. Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-04 18:13:44 +08:00
b main
.end __start
.globl syscall
.ent syscall
syscall:
Fix FreeBSD loader API so that it works on both 32-bit and 64-bit targets. Specifically tested on MIPS under QEMU (works with all combination of bit-ness and endian-ness) Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-17 21:23:31 +08:00
PTR_S $ra, return_addr
PTR_L $t9, syscall_ptr
api: Add FreeBSD API support for MIPS platforms This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms. Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-04 18:13:44 +08:00
jalr $t9
nop
Fix FreeBSD loader API so that it works on both 32-bit and 64-bit targets. Specifically tested on MIPS under QEMU (works with all combination of bit-ness and endian-ness) Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-17 21:23:31 +08:00
PTR_L $ra, return_addr
api: Add FreeBSD API support for MIPS platforms This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms. Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-04 18:13:44 +08:00
jr $ra
nop
.end syscall
return_addr:
Fix FreeBSD loader API so that it works on both 32-bit and 64-bit targets. Specifically tested on MIPS under QEMU (works with all combination of bit-ness and endian-ness) Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-17 21:23:31 +08:00
.align 8
api: Add FreeBSD API support for MIPS platforms This patch adds U-Boot API support (used by FreeBSD loader) for MIPS platforms. Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-04 18:13:44 +08:00
.long 0
API: Use stack pointer as API signature search hint in the glue layer. De-hardcode range in RAM we search for the API signature. Instead use the stack pointer as a hint to narrow down the range in which the signature could reside (it is malloc'ed on the U-Boot heap, and is hoped to remain in some proximity from stack area). Adjust PowerPC code in API demo to the new scheme. Signed-off-by: Rafal Czubak <rcz@semihalf.com> Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2009-01-23 20:27:15 +08:00
#else
#error No support for this arch!
#endif
API for external applications. This is an API for external (standalone) applications running on top of U-Boot, and is meant to be more extensible and robust than the existing jumptable mechanism. It is similar to UNIX syscall approach. See api/README for more details. Included is the demo application using this new framework (api_examples). Please note this is still an experimental feature, and is turned off by default. Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2008-01-10 02:39:36 +08:00
.globl syscall_ptr
syscall_ptr:
Fix FreeBSD loader API so that it works on both 32-bit and 64-bit targets. Specifically tested on MIPS under QEMU (works with all combination of bit-ness and endian-ness) Signed-off-by: Stanislav Galabov <sgalabov@gmail.com>
2016-02-17 21:23:31 +08:00
.align 8
API for external applications. This is an API for external (standalone) applications running on top of U-Boot, and is meant to be more extensible and robust than the existing jumptable mechanism. It is similar to UNIX syscall approach. See api/README for more details. Included is the demo application using this new framework (api_examples). Please note this is still an experimental feature, and is turned off by default. Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2008-01-10 02:39:36 +08:00
.long 0
API: Use stack pointer as API signature search hint in the glue layer. De-hardcode range in RAM we search for the API signature. Instead use the stack pointer as a hint to narrow down the range in which the signature could reside (it is malloc'ed on the U-Boot heap, and is hoped to remain in some proximity from stack area). Adjust PowerPC code in API demo to the new scheme. Signed-off-by: Rafal Czubak <rcz@semihalf.com> Signed-off-by: Rafal Jaworowski <raj@semihalf.com>
2009-01-23 20:27:15 +08:00
.globl search_hint
search_hint:
.long 0
Reference in New Issue Copy Permalink