diff options
| author | Leo Yan <leo.yan@linaro.org> | 2017-09-07 14:56:32 +0800 |
|---|---|---|
| committer | Leo Yan <leo.yan@linaro.org> | 2017-09-07 16:57:31 +0800 |
| commit | e246617b41825e5278ac0057e800afa3b3944fe3 (patch) | |
| tree | 00c4aef07d814e06d29a189fe631762a13dc967b /plat/hisilicon | |
| parent | e524d78f9fc904b0e831855145320384e9656a46 (diff) | |
| download | platform_external_arm-trusted-firmware-e246617b41825e5278ac0057e800afa3b3944fe3.tar.gz platform_external_arm-trusted-firmware-e246617b41825e5278ac0057e800afa3b3944fe3.tar.bz2 platform_external_arm-trusted-firmware-e246617b41825e5278ac0057e800afa3b3944fe3.zip | |
Hikey: enable CPU debug module
Every CPU has its own debug module and this module is used by JTAG
debugging and coresight tracing. If without enabling it, it's easily to
introduce lockup issue when we enable debugging features.
This patch is to enable CPU debug module when power on CPU; this allows
connecting to all cores through JTAG and used by kernel coresight
driver.
Signed-off-by: Matthias Welwarsky <maw@sysgo.com>
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Diffstat (limited to 'plat/hisilicon')
| -rw-r--r-- | plat/hisilicon/hikey/hikey_pm.c | 2 | ||||
| -rw-r--r-- | plat/hisilicon/hikey/hisi_pwrc.c | 15 | ||||
| -rw-r--r-- | plat/hisilicon/hikey/include/hisi_pwrc.h | 2 |
3 files changed, 19 insertions, 0 deletions
diff --git a/plat/hisilicon/hikey/hikey_pm.c b/plat/hisilicon/hikey/hikey_pm.c index c796e8a54..d4dd683e0 100644 --- a/plat/hisilicon/hikey/hikey_pm.c +++ b/plat/hisilicon/hikey/hikey_pm.c @@ -40,7 +40,9 @@ static int hikey_pwr_domain_on(u_register_t mpidr) hisi_ipc_cluster_on(cpu, cluster); hisi_pwrc_set_core_bx_addr(cpu, cluster, hikey_sec_entrypoint); + hisi_pwrc_enable_debug(cpu, cluster); hisi_ipc_cpu_on(cpu, cluster); + return 0; } diff --git a/plat/hisilicon/hikey/hisi_pwrc.c b/plat/hisilicon/hikey/hisi_pwrc.c index 8e9d1fc44..b635fb16f 100644 --- a/plat/hisilicon/hikey/hisi_pwrc.c +++ b/plat/hisilicon/hikey/hisi_pwrc.c @@ -51,6 +51,21 @@ void hisi_pwrc_set_cluster_wfi(unsigned int cluster) } } +void hisi_pwrc_enable_debug(unsigned int core, unsigned int cluster) +{ + unsigned int val, enable; + + enable = 1U << (core + PDBGUP_CLUSTER1_SHIFT * cluster); + + /* Enable debug module */ + val = mmio_read_32(ACPU_SC_PDBGUP_MBIST); + mmio_write_32(ACPU_SC_PDBGUP_MBIST, val | enable); + do { + /* RAW barrier */ + val = mmio_read_32(ACPU_SC_PDBGUP_MBIST); + } while (!(val & enable)); +} + int hisi_pwrc_setup(void) { unsigned int reg, sec_entrypoint; diff --git a/plat/hisilicon/hikey/include/hisi_pwrc.h b/plat/hisilicon/hikey/include/hisi_pwrc.h index 3a87e72be..cffe70e3b 100644 --- a/plat/hisilicon/hikey/include/hisi_pwrc.h +++ b/plat/hisilicon/hikey/include/hisi_pwrc.h @@ -13,6 +13,8 @@ void hisi_pwrc_set_cluster_wfi(unsigned int id); void hisi_pwrc_set_core_bx_addr(unsigned int core, unsigned int cluster, uintptr_t entry_point); +void hisi_pwrc_enable_debug(unsigned int core, + unsigned int cluster); int hisi_pwrc_setup(void); #endif /*__ASSEMBLY__*/ |