diff options
| -rw-r--r-- | src/arch/x86/Kconfig | 7 | ||||
| -rw-r--r-- | src/arch/x86/bootblock_crt0.S | 9 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig index 724c4dba61..8609e20136 100644 --- a/src/arch/x86/Kconfig +++ b/src/arch/x86/Kconfig @@ -117,6 +117,13 @@ config PC80_SYSTEM bool default y if ARCH_X86 +config BOOTBLOCK_DEBUG_SPINLOOP + bool + default n + help + Add a spin (JMP .) in bootblock_crt0.S during early bootblock to wait + for a JTAG debugger to break into the execution sequence. + config BOOTBLOCK_MAINBOARD_INIT string diff --git a/src/arch/x86/bootblock_crt0.S b/src/arch/x86/bootblock_crt0.S index 9fbce5dbb5..8ae82b4368 100644 --- a/src/arch/x86/bootblock_crt0.S +++ b/src/arch/x86/bootblock_crt0.S @@ -32,6 +32,15 @@ #include <cpu/x86/16bit/reset16.inc> #include <cpu/x86/32bit/entry32.inc> +#if IS_ENABLED(CONFIG_BOOTBLOCK_DEBUG_SPINLOOP) + + /* Wait for a JTAG debugger to break in and set EBX non-zero */ + xor %ebx, %ebx + +debug_spinloop: + cmp $0, %ebx + jz debug_spinloop +#endif bootblock_protected_mode_entry: /* Save BIST result */ |