diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2012-12-11 11:30:37 +0000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2012-12-11 11:30:37 +0000 |
| commit | bf471f7950e9dc9416747b2774eb712f63afe5a7 (patch) | |
| tree | 5196a231d3135148033e6287a5c59a58cb98574f /hw/highbank.c | |
| parent | 1c97e303d4ea80a2691334b0febe87a50660f99d (diff) | |
hw/arm_boot, exynos4210, highbank: Fix secondary boot GIC init
Fix the code in the secondary CPU boot stubs so that it correctly
initialises the GIC rather than relying on bugs or implementation
dependent aspects of the QEMU GIC implementation:
* set the GIC_PMR.Priority field to all-ones, so that all
interrupts are passed through. The default of all-zeroes
means all interrupts are masked, and QEMU only booted because
of a bug in the priority masking in our GIC implementation.
* add a barrier after GIC setup and before WFI to ensure that
GIC config is complete before we go into a possible low power
state. This isn't needed with the software GIC model but could
be required when using KVM and executing this code on the
real hardware CPU.
Note that of the three secondary stub implementations, only
the common generic one needs to support both v6 and v7 DSB
encodings; highbank and exynos4210 will always be v7 CPUs.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Igor Mitsyanko <i.mitsyanko@samsung.com>
Diffstat (limited to 'hw/highbank.c')
| -rw-r--r-- | hw/highbank.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/hw/highbank.c b/hw/highbank.c index afbb005422..447e57d758 100644 --- a/hw/highbank.c +++ b/hw/highbank.c @@ -44,9 +44,12 @@ static void hb_write_secondary(ARMCPU *cpu, const struct arm_boot_info *info) 0xe210000f, /* ands r0, r0, #0x0f */ 0xe3a03040, /* mov r3, #0x40 - jump address is 0x40 + 0x10 * core id */ 0xe0830200, /* add r0, r3, r0, lsl #4 */ - 0xe59f2018, /* ldr r2, privbase */ + 0xe59f2024, /* ldr r2, privbase */ 0xe3a01001, /* mov r1, #1 */ - 0xe5821100, /* str r1, [r2, #256] */ + 0xe5821100, /* str r1, [r2, #256] - set GICC_CTLR.Enable */ + 0xe3a010ff, /* mov r1, #0xff */ + 0xe5821104, /* str r1, [r2, #260] - set GICC_PMR.Priority to 0xff */ + 0xf57ff04f, /* dsb */ 0xe320f003, /* wfi */ 0xe5901000, /* ldr r1, [r0] */ 0xe1110001, /* tst r1, r1 */ |