diff options
Diffstat (limited to 'src/soc/intel/common/block')
| -rw-r--r-- | src/soc/intel/common/block/cse/cse.c | 22 | ||||
| -rw-r--r-- | src/soc/intel/common/block/include/intelblocks/cse.h | 20 |
2 files changed, 42 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/cse/cse.c b/src/soc/intel/common/block/cse/cse.c index 9520242d2e..1671970a19 100644 --- a/src/soc/intel/common/block/cse/cse.c +++ b/src/soc/intel/common/block/cse/cse.c @@ -503,6 +503,28 @@ int heci_reset(void) return 0; } +bool is_cse_enabled(void) +{ + const struct device *cse_dev = pcidev_path_on_root(PCH_DEVFN_CSE); + + if (!cse_dev || !cse_dev->enabled) { + printk(BIOS_WARNING, "HECI: No CSE device\n"); + return false; + } + + if (pci_read_config16(PCH_DEV_CSE, PCI_VENDOR_ID) == 0xFFFF) { + printk(BIOS_WARNING, "HECI: CSE device is hidden\n"); + return false; + } + + return true; +} + +uint32_t me_read_config32(int offset) +{ + return pci_read_config32(PCH_DEV_CSE, offset); +} + #if ENV_RAMSTAGE static void update_sec_bar(struct device *dev) diff --git a/src/soc/intel/common/block/include/intelblocks/cse.h b/src/soc/intel/common/block/include/intelblocks/cse.h index 424d483cfa..bce615c172 100644 --- a/src/soc/intel/common/block/include/intelblocks/cse.h +++ b/src/soc/intel/common/block/include/intelblocks/cse.h @@ -19,6 +19,16 @@ #include <stdint.h> +/* HFSTS register offsets in PCI config space */ +enum { + PCI_ME_HFSTS1 = 0x40, + PCI_ME_HFSTS2 = 0x48, + PCI_ME_HFSTS3 = 0x60, + PCI_ME_HFSTS4 = 0x64, + PCI_ME_HFSTS5 = 0x68, + PCI_ME_HFSTS6 = 0x6C, +}; + /* set up device for use in early boot enviroument with temp bar */ void heci_init(uintptr_t bar); /* @@ -52,6 +62,16 @@ int heci_send_receive(const void *snd_msg, size_t snd_sz, void *rcv_msg, size_t */ int heci_reset(void); +/* Reads config value from a specified offset in the CSE PCI Config space. */ +uint32_t me_read_config32(int offset); + +/* + * Check if the CSE device is enabled in device tree. Also check if the device + * is visible on the PCI bus by reading config space. + * Return true if device present and config space enabled, else return false. + */ +bool is_cse_enabled(void); + #define BIOS_HOST_ADDR 0x00 #define HECI_MKHI_ADDR 0x07 |