diff options
| author | ot_zhenguo.li <ot_zhenguo.li@mediatek.corp-partner.google.com> | 2022-08-11 19:32:09 +0800 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-09-09 10:45:08 +0000 |
| commit | e125bea5a06a84b8906b9bda1a3d2d7ab4c18a8e (patch) | |
| tree | ccbd8f331dcb5705a15346aab37ae9ec5ed2b119 /src/soc/mediatek/common/lastbus.c | |
| parent | 2b1fdb034a895811283383c7fda1ecc3016f5a42 (diff) | |
soc/mediatek/mt8186: Enable lastbus debug hardware
Lastbus is a bus debug tool. When the bus hangs, the bus transmission
information before resetting will be recorded.
The watchdog cannot clear it and it will be printed out for bus hanging
analysis.
TEST=build pass.
BUG=none
Signed-off-by: ot_zhenguo.li <ot_zhenguo.li@mediatek.corp-partner.google.com>
Change-Id: Iff39486dfad556a3104b2f2b6811c34c2ded6954
Reviewed-on: https://review.coreboot.org/c/coreboot/+/67437
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Diffstat (limited to 'src/soc/mediatek/common/lastbus.c')
| -rw-r--r-- | src/soc/mediatek/common/lastbus.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/src/soc/mediatek/common/lastbus.c b/src/soc/mediatek/common/lastbus.c new file mode 100644 index 0000000000..cf4f8d1a42 --- /dev/null +++ b/src/soc/mediatek/common/lastbus.c @@ -0,0 +1,65 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <console/console.h> +#include <device/mmio.h> +#include <soc/addressmap.h> +#include <soc/lastbus.h> + +static unsigned long preisys_dump_offset[] = { + 0x500, /* PERIBUS_DBG0 */ + 0x504, /* PERIBUS_DBG1 */ + 0x508, /* PERIBUS_DBG2 */ + 0x50C, /* PERIBUS_DBG3 */ + 0x510, /* PERIBUS_DBG4 */ + 0x514, /* PERIBUS_DBG5 */ + 0x518, /* PERIBUS_DBG6 */ + 0x51C, /* PERIBUS_DBG7 */ + 0x520, /* PERIBUS_DBG8 */ + 0x524, /* PERIBUS_DBG9 */ + 0x528, /* PERIBUS_DBG10 */ + 0x52C, /* PERIBUS_DBG11 */ + 0x530, /* PERIBUS_DBG12 */ + 0x534, /* PERIBUS_DBG13 */ + 0x538, /* PERIBUS_DBG14 */ + 0x53C, /* PERIBUS_DBG15 */ + 0x580, /* PERIBUS_DBG16 */ + 0x584, /* PERIBUS_DBG17 */ +}; + +static void lastbus_setup(void) +{ + /* peri lastbus init */ + write32p(PERICFG_BASE + BUS_PERI_R0, PERISYS_TIMEOUT); + write32p(PERICFG_BASE + BUS_PERI_R1, PERISYS_ENABLE); + + /* infra lastbus init */ + write32p(INFRACFG_AO_BASE + BUS_INFRA_CTRL, INFRASYS_CONFIG); +} + +static void lastbus_dump(void) +{ + unsigned int i; + uintptr_t reg; + + if (read32p(INFRACFG_AO_BASE + BUS_INFRA_CTRL) & 0x1) { + printk(BIOS_DEBUG, "** Dump lastbus infra debug registers start **\n"); + for (i = 0; i < INFRA_NUM; i++) { + reg = INFRACFG_AO_BASE + BUS_INFRA_SNAPSHOT + 4 * i; + printk(BIOS_DEBUG, "%08x\n", read32p(reg)); + } + } + + if (read32p(PERICFG_BASE + BUS_PERI_R1) & 0x1) { + printk(BIOS_DEBUG, "** Dump lastbus peri debug registers start **\n"); + for (i = 0; i < PERI_NUM; i++) { + reg = PERICFG_BASE + preisys_dump_offset[i]; + printk(BIOS_DEBUG, "%08x\n", read32p(reg)); + } + } +} + +void lastbus_init(void) +{ + lastbus_dump(); + lastbus_setup(); +} |