diff options
| author | Rick Chen <rick@andestech.com> | 2017-12-26 13:55:57 +0800 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-01-12 08:05:12 -0500 |
| commit | c7d7e80acdd5585a63ca548e87c8694dc9d2fefa (patch) | |
| tree | e45455d808376b0275d055c014fea2c1804569d5 /examples | |
| parent | 42ac26f2b0c94f27170fdca2d7d05dbfb9a1d3fd (diff) | |
riscv: Support standalone
Run hello_world successfully.
U-Boot 2018.01-rc2-00033-gb265b91-dirty (Dec 22 2017 - 13:54:21 +0800)
DRAM: 1 GiB
MMC: mmc@f0e00000: 0
SF: Detected mx25u1635e with page size 256 Bytes, erase size 4 KiB, total 2 MiB
In: serial@f0300000
Out: serial@f0300000
Err: serial@f0300000
Net:
Warning: mac@e0100000 (eth0) using random MAC address - 0a:47:9b:f8:b4:f2
eth0: mac@e0100000
RISC-V # mmc rescan
RISC-V # fatls mmc 0:1
318907 u-boot-ae250-64.bin
1252 hello_world_ae250_32.bin
328787 u-boot-ae250-32.bin
3 file(s), 0 dir(s)
RISC-V # fatload mmc 0:1 0x600000 hello_world_ae250_32.bin
reading hello_world_ae250_32.bin
1252 bytes read in 23 ms (52.7 KiB/s)
RISC-V # go 0x600000
Example expects ABI version 9
Actual U-Boot ABI version 9
Hello World
argc = 1
argv[0] = "0x600000"
argv[1] = "$B@"
Hit any key to exit ...
RISC-V #
Signed-off-by: Rick Chen <rick@andestech.com>
Signed-off-by: Rick Chen <rickchen36@gmail.com>
Signed-off-by: Greentime Hu <green.hu@gmail.com>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/standalone/riscv.lds | 41 | ||||
| -rw-r--r-- | examples/standalone/stubs.c | 12 |
2 files changed, 53 insertions, 0 deletions
diff --git a/examples/standalone/riscv.lds b/examples/standalone/riscv.lds new file mode 100644 index 0000000000..7d8c482250 --- /dev/null +++ b/examples/standalone/riscv.lds @@ -0,0 +1,41 @@ +/* + * Copyright (C) 2017 Andes Technology Corporation + * Rick Chen, Andes Technology Corporation <rick@andestech.com> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +OUTPUT_ARCH(riscv) +ENTRY(_start) +SECTIONS +{ + . = ALIGN(4); + .text : + { + *(.text) + } + + . = ALIGN(4); + .data : { + __global_pointer$ = . + 0x800; + *(.data) + } + + . = ALIGN(4); + + .got : { + __got_start = .; + *(.got) + __got_end = .; + } + + . = ALIGN(4); + __bss_start = .; + .bss : { *(.bss) } + __bss_end = .; + + . = ALIGN(4); + .rela.text : { *(.rela.text .rela.text.* .rela.gnu.linkonce.t.*) } + + _end = .; +} diff --git a/examples/standalone/stubs.c b/examples/standalone/stubs.c index 9c7a8c00f8..fadde669fa 100644 --- a/examples/standalone/stubs.c +++ b/examples/standalone/stubs.c @@ -172,6 +172,18 @@ gd_t *global_data; " lwi $r16, [$r16 + (%1)]\n" \ " jr $r16\n" \ : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "$r16"); +#elif defined(CONFIG_RISCV) +/* + * t7 holds the pointer to the global_data. gp is call clobbered. + */ +#define EXPORT_FUNC(f, a, x, ...) \ + asm volatile ( \ +" .globl " #x "\n" \ +#x ":\n" \ +" lw x19, %0(gp)\n" \ +" lw x19, %1(x19)\n" \ +" jr x19\n" \ + : : "i"(offsetof(gd_t, jt)), "i"(FO(x)) : "x19"); #elif defined(CONFIG_ARC) /* * r25 holds the pointer to the global_data. r10 is call clobbered. |