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mkimage: sunxi_egon: refactor for multi-architecture support

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Refactor some functions in mkimage sunxi_egon type, in order to prepare
for adding support for more CPU architectures (e.g. RISC-V). In
addition, compatibility for operation w/o specified architecture is
kept, in this case the architecture is assumed as ARM.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Icenowy Zheng 2021-10-14 20:53:05 -05:00 committed by Andre Przywara
parent c2d08f0110
commit 82ae151aee
1 changed files with 43 additions and 7 deletions
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50
tools/sunxi_egon.c
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@ -15,9 +15,28 @@
#define PAD_SIZE 8192
#define PAD_SIZE_MIN 512
static int egon_get_arch(struct image_tool_params *params)
{
if (params->Aflag)
return params->arch;
/* For compatibility, assume ARM when no architecture specified */
return IH_ARCH_ARM;
}
static int egon_check_params(struct image_tool_params *params)
{
/* We just need a binary image file. */
/*
* Check whether the architecture is supported.
*/
switch (egon_get_arch(params)) {
case IH_ARCH_ARM:
break;
default:
return EXIT_FAILURE;
}
/* We need a binary image file. */
return !params->dflag;
}
@ -27,9 +46,18 @@ static int egon_verify_header(unsigned char *ptr, int image_size,
const struct boot_file_head *header = (void *)ptr;
uint32_t length;
/* First 4 bytes must be an ARM branch instruction. */
if ((le32_to_cpu(header->b_instruction) & 0xff000000) != 0xea000000)
return EXIT_FAILURE;
/*
* First 4 bytes must be a branch instruction of the corresponding
* architecture.
*/
switch (egon_get_arch(params)) {
case IH_ARCH_ARM:
if ((le32_to_cpu(header->b_instruction) & 0xff000000) != 0xea000000)
return EXIT_FAILURE;
break;
default:
return EXIT_FAILURE; /* Unknown architecture */
}
if (memcmp(header->magic, BOOT0_MAGIC, sizeof(header->magic)))
return EXIT_FAILURE;
@ -78,9 +106,17 @@ static void egon_set_header(void *buf, struct stat *sbuf, int infd,
uint32_t checksum = 0, value;
int i;
/* Generate an ARM branch instruction to jump over the header. */
value = 0xea000000 | (sizeof(struct boot_file_head) / 4 - 2);
header->b_instruction = cpu_to_le32(value);
/*
* Different architectures need different first instruction to
* branch to the body.
*/
switch (egon_get_arch(params)) {
case IH_ARCH_ARM:
/* Generate an ARM branch instruction to jump over the header. */
value = 0xea000000 | (sizeof(struct boot_file_head) / 4 - 2);
header->b_instruction = cpu_to_le32(value);
break;
}
memcpy(header->magic, BOOT0_MAGIC, sizeof(header->magic));
header->check_sum = cpu_to_le32(BROM_STAMP_VALUE);