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bios: add romboot

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When firmware is small enough, it can be interesting to run code from an embedded blockram memory (faster and not impacted by memory controller activity).
It can also be a fallback option in case boot from flash failed.
To use this, define ROM_BOOT_ADDRESS and initialize the blockram with the firmware data.
This commit is contained in:
Florent Kermarrec 2015-07-14 17:33:24 +02:00
parent 6c13879fb6
commit 35250f5b11
3 changed files with 21 additions and 0 deletions
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11
software/bios/boot.c
View file

@ -269,3 +269,14 @@ void flashboot(void)
boot(0, 0, 0, MAIN_RAM_BASE);
}
#endif
#ifdef ROM_BOOT_ADDRESS
/* When firmware is small enough, it can be interesting to run code from an
embedded blockram memory (faster and not impacted by memory controller
activity). Define ROM_BOOT_ADDRESS for that and initialize the blockram
with the firmware data. */
void romboot(void)
{
boot(0, 0, 0, ROM_BOOT_ADDRESS);
}
#endif

1
software/bios/boot.h
View file

@ -4,5 +4,6 @@
void serialboot(void);
void netboot(void);
void flashboot(void);
void romboot(void);
#endif /* __BOOT_H */

9
software/bios/main.c
View file

@ -325,6 +325,9 @@ static void help(void)
puts("serialboot - boot via SFL");
#ifdef FLASH_BOOT_ADDRESS
puts("flashboot - boot from flash");
#endif
#ifdef ROM_BOOT_ADDRESS
puts("romboot - boot from embedded rom");
#endif
puts("revision - display revision");
#ifdef CSR_SDRAM_BASE
@ -365,6 +368,9 @@ static void do_command(char *c)
#ifdef FLASH_BOOT_ADDRESS
else if(strcmp(token, "flashboot") == 0) flashboot();
#endif
#ifdef ROM_BOOT_ADDRESS
else if(strcmp(token, "romboot") == 0) romboot();
#endif
else if(strcmp(token, "serialboot") == 0) serialboot();
#ifdef CSR_ETHMAC_BASE
@ -506,6 +512,9 @@ static void boot_sequence(void)
if(test_user_abort()) {
#ifdef FLASH_BOOT_ADDRESS
flashboot();
#endif
#ifdef ROM_BOOT_ADDRESS
romboot();
#endif
serialboot();
#ifdef CSR_ETHMAC_BASE