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bios: add romboot 

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