Hi Tesuyuki and friends, I had a question with this patch.
On Wed, Jun 27, 2012 at 8:27 PM, Tetsuyuki Kobayashi <[email protected]> wrote: >>> This patch moves vector table before jumping relocated code. >>> >>> Signed-off-by: Tetsuyuki Kobayashi<[email protected]> >>> --- >>> arch/arm/cpu/armv7/start.S | 12 ++++++++++++ >>> 1 file changed, 12 insertions(+) >>> >>> diff --git a/arch/arm/cpu/armv7/start.S b/arch/arm/cpu/armv7/start.S >>> index 52f7f6e..5098f7b 100644 >>> --- a/arch/arm/cpu/armv7/start.S >>> +++ b/arch/arm/cpu/armv7/start.S >>> @@ -277,6 +277,18 @@ jump_2_ram: >>> mcr p15, 0, r0, c7, c10, 4 @ DSB >>> mcr p15, 0, r0, c7, c5, 4 @ ISB >>> #endif >>> +/* >>> + * Move vector table >>> + */ >>> +#if !defined(CONFIG_TEGRA2) >>> +#if !(defined(CONFIG_OMAP44XX)&& defined(CONFIG_SPL_BUILD)) >>> >>> + /* Set vector address in CP15 VBAR register */ >>> + ldr r0, =_start >>> + add r0, r0, r9 >>> + mcr p15, 0, r0, c12, c0, 0 @Set VBAR >>> +#endif Why is c12 (VBAR) setup only for SPL builds? Because main u-boot does relocation too, shouldn't we setup c12 to point to new table addr after relocation? Also how do interrupts (irq/fiq) work at all in U-boot if c12 is not setup to point to the new vector table address after relocation? Thanks, Joel _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
