| Message ID | 1327079158-29303-1-git-send-email-peter.maydell@linaro.org |
|---|---|
| State | New |
| Headers | show |
On 01/20/2012 11:05 AM, Peter Maydell wrote: > Support passing a board ID value to the kernel in r1 > that is more than 16 bits wide. This is needed to pass > the '-1 == invalid' value for boards which only support > device tree booting. > > Signed-off-by: Peter Maydell <peter.maydell@linaro.org> > --- > This applies after the Calxeda patchset. Mark, I suggest you put it > in your patchset in the appropriate place. Thanks, very helpful. I'm currently tracking down a bug in which linux/arch/arm/kernel/smp.c scu_get_core_count() returns the value of the raw_readl of scu_base + SCU_CONFIG (0xfee00004) as the value of smpboot[0]. It seems to be bypassing the a9mpcore.c code entirely. I'm not sure what's happening there. --Mark Langsdorf Calxeda, Inc.
diff --git a/hw/arm_boot.c b/hw/arm_boot.c index 8f73a29..01ca997 100644 --- a/hw/arm_boot.c +++ b/hw/arm_boot.c @@ -20,10 +20,10 @@ /* The worlds second smallest bootloader. Set r0-r2, then jump to kernel. */ static uint32_t bootloader[] = { 0xe3a00000, /* mov r0, #0 */ - 0xe3a01000, /* mov r1, #0x?? */ - 0xe3811c00, /* orr r1, r1, #0x??00 */ - 0xe59f2000, /* ldr r2, [pc, #0] */ - 0xe59ff000, /* ldr pc, [pc, #0] */ + 0xe59f1004, /* ldr r1, [pc, #4] */ + 0xe59f2004, /* ldr r2, [pc, #4] */ + 0xe59ff004, /* ldr pc, [pc, #4] */ + 0, /* Board ID */ 0, /* Address of kernel args. Set by integratorcp_init. */ 0 /* Kernel entry point. Set by integratorcp_init. */ }; @@ -289,8 +289,7 @@ void arm_load_kernel(CPUState *env, struct arm_boot_info *info) } else { initrd_size = 0; } - bootloader[1] |= info->board_id & 0xff; - bootloader[2] |= (info->board_id >> 8) & 0xff; + bootloader[4] = info->board_id; bootloader[5] = info->loader_start + KERNEL_ARGS_ADDR; bootloader[6] = entry; for (n = 0; n < sizeof(bootloader) / 4; n++) {
Support passing a board ID value to the kernel in r1 that is more than 16 bits wide. This is needed to pass the '-1 == invalid' value for boards which only support device tree booting. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> --- This applies after the Calxeda patchset. Mark, I suggest you put it in your patchset in the appropriate place. hw/arm_boot.c | 11 +++++------ 1 files changed, 5 insertions(+), 6 deletions(-)