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Tegra194: update cache operations supported by the ROC 

This patch updates the cache ops to use system registers in
order to trigger cache flush/clean operations.

Change-Id: I888abad22f22b8a33c7193b991fad8c4a78030d0
Signed-off-by: Steven Kao <skao@nvidia.com>
This commit is contained in:
Steven Kao 2017-08-16 20:12:00 +08:00 committed by Varun Wadekar
parent f32e852596
commit 72e8caa746
3 changed files with 62 additions and 19 deletions
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3
plat/nvidia/tegra/soc/t194/drivers/include/mce_private.h
View File

@ -75,5 +75,8 @@ int32_t nvg_enter_cstate(uint32_t state, uint32_t wake_time);
void nvg_set_request_data(uint64_t req, uint64_t data);
void nvg_set_request(uint64_t req);
uint64_t nvg_get_result(void);
uint64_t nvg_cache_clean(void);
uint64_t nvg_cache_clean_inval(void);
uint64_t nvg_cache_inval_all(void);
#endif /* __MCE_PRIVATE_H__ */

21
plat/nvidia/tegra/soc/t194/drivers/mce/aarch64/nvg_helpers.S
View File

@ -10,6 +10,9 @@
.globl nvg_set_request_data
.globl nvg_set_request
.globl nvg_get_result
.globl nvg_cache_clean
.globl nvg_cache_clean_inval
.globl nvg_cache_inval_all
/* void nvg_set_request_data(uint64_t req, uint64_t data) */
func nvg_set_request_data
@ -29,3 +32,21 @@ func nvg_get_result
mrs x0, s3_0_c15_c1_3
ret
endfunc nvg_get_result
/* uint64_t nvg_cache_clean(void) */
func nvg_cache_clean
mrs x0, s3_0_c15_c3_5
ret
endfunc nvg_cache_clean
/* uint64_t nvg_cache_clean_inval(void) */
func nvg_cache_clean_inval
mrs x0, s3_0_c15_c3_6
ret
endfunc nvg_cache_clean_inval
/* uint64_t nvg_cache_inval_all(void) */
func nvg_cache_inval_all
mrs x0, s3_0_c15_c3_7
ret
endfunc nvg_cache_inval_all

57
plat/nvidia/tegra/soc/t194/drivers/mce/nvg.c
View File

@ -15,10 +15,8 @@
#include <t194_nvg.h>
#include <tegra_private.h>
extern void nvg_set_request_data(uint64_t req, uint64_t data);
extern void nvg_set_request(uint64_t req);
extern uint64_t nvg_get_result(void);
#define ID_AFR0_EL1_CACHE_OPS_SHIFT 12
#define ID_AFR0_EL1_CACHE_OPS_MASK 0xFU
/*
* Reports the major and minor version of this interface.
*
@ -306,41 +304,62 @@ int32_t nvg_update_ccplex_gsc(uint32_t gsc_idx)
/*
* Cache clean operation for all CCPLEX caches.
*
* NVGDATA[0] cache_clean
*/
int32_t nvg_roc_clean_cache(void)
{
nvg_set_request_data(TEGRA_NVG_CHANNEL_CCPLEX_CACHE_INVAL,
(uint64_t)CACHE_CLEAN_SET);
int32_t ret = 0;
return 0;
/* check if cache flush through mts is supported */
if (((read_id_afr0_el1() >> ID_AFR0_EL1_CACHE_OPS_SHIFT) &
ID_AFR0_EL1_CACHE_OPS_MASK) == 1U) {
if (nvg_cache_clean() == 0U) {
ERROR("%s: failed\n", __func__);
ret = EINVAL;
}
} else {
ret = EINVAL;
}
return ret;
}
/*
* Cache clean and invalidate operation for all CCPLEX caches.
*
* NVGDATA[1] cache_clean_inval
*/
int32_t nvg_roc_flush_cache(void)
{
nvg_set_request_data(TEGRA_NVG_CHANNEL_CCPLEX_CACHE_INVAL,
(uint64_t)CACHE_CLEAN_INVAL_SET);
int32_t ret = 0;
return 0;
/* check if cache flush through mts is supported */
if (((read_id_afr0_el1() >> ID_AFR0_EL1_CACHE_OPS_SHIFT) &
ID_AFR0_EL1_CACHE_OPS_MASK) == 1U) {
if (nvg_cache_clean_inval() == 0U) {
ERROR("%s: failed\n", __func__);
ret = EINVAL;
}
} else {
ret = EINVAL;
}
return ret;
}
/*
* Cache clean and invalidate, clear TR-bit operation for all CCPLEX caches.
*
* NVGDATA[2] cache_clean_inval_tr
*/
int32_t nvg_roc_clean_cache_trbits(void)
{
nvg_set_request_data(TEGRA_NVG_CHANNEL_CCPLEX_CACHE_INVAL,
(uint64_t)CACHE_CLEAN_INVAL_TR_SET);
int32_t ret = 0;
return 0;
/* check if cache flush through mts is supported */
if (((read_id_afr0_el1() >> ID_AFR0_EL1_CACHE_OPS_SHIFT) &
ID_AFR0_EL1_CACHE_OPS_MASK) == 1U) {
if (nvg_cache_inval_all() == 0U) {
ERROR("%s: failed\n", __func__);
ret = EINVAL;
}
} else {
ret = EINVAL;
}
return ret;
}
/*