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chickens: Enable NEX power gating on P-cores

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It seems we missed this config all along.

Signed-off-by: Hector Martin <marcan@marcan.st>
This commit is contained in:
Hector Martin 2023-04-17 22:14:52 +09:00
parent 8f6e13b170
commit b2a479f1bf
2 changed files with 9 additions and 0 deletions
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6
src/chickens.c
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@ -50,6 +50,12 @@ const char *init_cpu(void)
else
reg_set(SYS_IMP_APL_HID4, HID4_DISABLE_DC_MVA | HID4_DISABLE_DC_SW_L2_OPS);
/* Enable NEX powergating, the reset cycles might be overriden by chickens */
if (!is_ecore()) {
reg_mask(SYS_IMP_APL_HID13, HID13_RESET_CYCLES_MASK, HID13_RESET_CYCLES(12));
reg_set(SYS_IMP_APL_HID14, HID14_ENABLE_NEX_POWER_GATING);
}
uint64_t midr = mrs(MIDR_EL1);
int part = FIELD_GET(MIDR_PART, midr);
int rev = (FIELD_GET(MIDR_REV_HIGH, midr) << 4) | FIELD_GET(MIDR_REV_LOW, midr);

3
src/cpu_regs.h
View file

@ -113,6 +113,9 @@
#define HID13_RESET_CYCLES(x) (((unsigned long)x) << 60)
#define HID13_RESET_CYCLES_MASK (0xFUL << 60)
#define SYS_IMP_APL_HID14 sys_reg(3, 0, 15, 15, 0)
#define HID14_ENABLE_NEX_POWER_GATING BIT(32)
#define SYS_IMP_APL_HID16 sys_reg(3, 0, 15, 15, 2)
#define HID16_AVL_UNK12 BIT(12)
#define HID16_SPAREBIT0 BIT(56)