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armv8/fsl-lsch3: Convert flushing L3 to assembly to avoid using stack

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Flushing L3 cache in CCN-504 requries d-cache to be disabled. Using
assembly function to guarantee stack is not used before flushing is
completed. Timeout is needed for simualtor on which CCN-504 is not
implemented. Return value can be checked for timeout situation.

Change bootm.c to disable dcache instead of simply flushing, required
by flushing L3.

Signed-off-by: York Sun <yorksun@freescale.com>
This commit is contained in:
York Sun
2015-01-06 13:18:42 -08:00
parent 60385d94e5
commit dcd468b8f4
6 changed files with 97 additions and 61 deletions
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2
arch/arm/lib/bootm.c
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@@ -191,7 +191,7 @@ __weak void setup_board_tags(struct tag **in_params) {}
static void do_nonsec_virt_switch(void)
{
smp_kick_all_cpus();
flush_dcache_all(); /* flush cache before swtiching to EL2 */
dcache_disable(); /* flush cache before swtiching to EL2 */
armv8_switch_to_el2();
#ifdef CONFIG_ARMV8_SWITCH_TO_EL1
armv8_switch_to_el1();