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u-boot/examples/api/crt0.S

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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>
2008-01-09 18:39:36 +00:00
/*
* (C) Copyright 2007 Semihalf
*
* Written by: Rafal Jaworowski <raj@semihalf.com>
*
Add GPL-2.0+ SPDX-License-Identifier to source files Signed-off-by: Wolfgang Denk <wd@denx.de> [trini: Fixup common/cmd_io.c] Signed-off-by: Tom Rini <trini@ti.com>
2013-07-08 07:37:19 +00:00
* 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>
2008-01-09 18:39:36 +00:00
*/
#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 12:27:15 +00:00
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>
2008-01-09 18:39:36 +00:00
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 12:27:16 +00:00
#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 10:13:44 +00:00
#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 13:23:31 +00:00
#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 10:13:44 +00:00
.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 13:23:31 +00:00
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 10:13:44 +00:00
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 13:23:31 +00:00
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 10:13:44 +00:00
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 13:23:31 +00:00
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 10:13:44 +00:00
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 13:23:31 +00:00
.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 10:13:44 +00:00
.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 12:27:15 +00:00
#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>
2008-01-09 18:39:36 +00:00
.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 13:23:31 +00:00
.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>
2008-01-09 18:39:36 +00:00
.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 12:27:15 +00:00
.globl search_hint
search_hint:
.long 0
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