forked from Minki/linux
59 lines
1.4 KiB
ArmAsm
59 lines
1.4 KiB
ArmAsm
|
/*
|
||
|
|
* L2C-310 early resume code. This can be used by platforms to restore
|
||
|
|
* the settings of their L2 cache controller before restoring the
|
||
|
|
* processor state.
|
||
|
|
*
|
||
|
|
* This code can only be used to if you are running in the secure world.
|
||
|
|
*/
|
||
|
|
#include <linux/linkage.h>
|
||
|
|
#include <asm/hardware/cache-l2x0.h>
|
||
|
|
|
||
|
|
.text
|
||
|
|
|
||
|
|
ENTRY(l2c310_early_resume)
|
||
|
|
adr r0, 1f
|
||
|
|
ldr r2, [r0]
|
||
|
|
add r0, r2, r0
|
||
|
|
|
||
|
|
ldmia r0, {r1, r2, r3, r4, r5, r6, r7, r8}
|
||
|
|
@ r1 = phys address of L2C-310 controller
|
||
|
|
@ r2 = aux_ctrl
|
||
|
|
@ r3 = tag_latency
|
||
|
|
@ r4 = data_latency
|
||
|
|
@ r5 = filter_start
|
||
|
|
@ r6 = filter_end
|
||
|
|
@ r7 = prefetch_ctrl
|
||
|
|
@ r8 = pwr_ctrl
|
||
|
|
|
||
|
|
@ Check that the address has been initialised
|
||
|
|
teq r1, #0
|
||
|
|
moveq pc, lr
|
||
|
|
|
||
|
|
@ The prefetch and power control registers are revision dependent
|
||
|
|
@ and can be written whether or not the L2 cache is enabled
|
||
|
|
ldr r0, [r1, #L2X0_CACHE_ID]
|
||
|
|
and r0, r0, #L2X0_CACHE_ID_RTL_MASK
|
||
|
|
cmp r0, #L310_CACHE_ID_RTL_R2P0
|
||
|
|
strcs r7, [r1, #L310_PREFETCH_CTRL]
|
||
|
|
cmp r0, #L310_CACHE_ID_RTL_R3P0
|
||
|
|
strcs r8, [r1, #L310_POWER_CTRL]
|
||
|
|
|
||
|
|
@ Don't setup the L2 cache if it is already enabled
|
||
|
|
ldr r0, [r1, #L2X0_CTRL]
|
||
|
|
tst r0, #L2X0_CTRL_EN
|
||
|
|
movne pc, lr
|
||
|
|
|
||
|
|
str r3, [r1, #L310_TAG_LATENCY_CTRL]
|
||
|
|
str r4, [r1, #L310_DATA_LATENCY_CTRL]
|
||
|
|
str r6, [r1, #L310_ADDR_FILTER_END]
|
||
|
|
str r5, [r1, #L310_ADDR_FILTER_START]
|
||
|
|
|
||
|
|
str r2, [r1, #L2X0_AUX_CTRL]
|
||
|
|
mov r9, #L2X0_CTRL_EN
|
||
|
|
str r9, [r1, #L2X0_CTRL]
|
||
|
|
mov pc, lr
|
||
|
|
ENDPROC(l2c310_early_resume)
|
||
|
|
|
||
|
|
.align
|
||
|
|
1: .long l2x0_saved_regs - .
|