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ARC: HSDK-4xD: add CSM configuration support

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Add support for CSM enable/disable and CSM relocation via
hsdk_init command. We allow to relocate CSM to the beginning of
any aperture even if HW support finer granularity.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
This commit is contained in:
Eugeniy Paltsev 2020-03-23 21:50:03 +03:00 committed by Alexey Brodkin
parent 1d897d1a22
commit 6917a9dbaf
2 changed files with 30 additions and 0 deletions
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3
arch/arc/include/asm/arcregs.h
View File

@ -51,6 +51,9 @@
#define ARC_AUX_DCCM_BASE 0x18 /* DCCM Base Addr ARCv2 */
#define ARC_AUX_ICCM_BASE 0x208 /* ICCM Base Addr ARCv2 */
/* CSM auxiliary registers */
#define ARC_AUX_CSM_ENABLE 0x9A0
/* Timer related auxiliary registers */
#define ARC_AUX_TIMER0_CNT 0x21 /* Timer 0 count */
#define ARC_AUX_TIMER0_CTRL 0x22 /* Timer 0 control */

27
board/synopsys/hsdk/hsdk.c
View File

@ -80,6 +80,7 @@ struct hsdk_env_common_ctl {
u32_env nvlim;
u32_env icache;
u32_env dcache;
u32_env csm_location;
u32_env l2_cache;
};
@ -132,6 +133,7 @@ static const struct env_map_common env_map_common[] = {
{ "dcache_ena", ENV_HEX, true, 0, 1, &env_common.dcache },
#if defined(CONFIG_BOARD_HSDK_4XD)
{ "l2_cache_ena", ENV_HEX, true, 0, 1, &env_common.l2_cache },
{ "csm_location", ENV_HEX, true, 0, NO_CCM, &env_common.csm_location },
#endif /* CONFIG_BOARD_HSDK_4XD */
{}
};
@ -299,6 +301,30 @@ static void init_cluster_slc(void)
slc_disable();
}
#define CREG_CSM_BASE (CREG_BASE + 0x210)
static void init_cluster_csm(void)
{
/* ARC HS38 in HSDK SoC doesn't include CSM */
if (!is_board_match_config(T_BOARD_HSDK_4XD))
return;
if (env_common.csm_location.val == NO_CCM) {
write_aux_reg(ARC_AUX_CSM_ENABLE, 0);
} else {
/*
* CSM base address is 256kByte aligned but we allow to map
* CSM only to aperture start (256MByte aligned)
* The field in CREG_CSM_BASE is in 17:2 bits itself so we need
* to shift it.
*/
u32 csm_base = (env_common.csm_location.val * SZ_1K) << 2;
write_aux_reg(ARC_AUX_CSM_ENABLE, 1);
writel(csm_base, (void __iomem *)CREG_CSM_BASE);
}
}
static void init_master_icache(void)
{
if (icache_status()) {
@ -678,6 +704,7 @@ static void do_init_cluster(void)
* cores.
*/
init_cluster_nvlim();
init_cluster_csm();
init_cluster_slc();
}