diff options
| -rw-r--r-- | discover/platform-powerpc.c | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/discover/platform-powerpc.c b/discover/platform-powerpc.c index b0a35a7..4eb2805 100644 --- a/discover/platform-powerpc.c +++ b/discover/platform-powerpc.c @@ -1,9 +1,11 @@ +#include <assert.h> #include <string.h> #include <stdlib.h> #include <limits.h> #include <sys/types.h> #include <sys/wait.h> +#include <sys/fcntl.h> #include <sys/stat.h> #include <talloc/talloc.h> @@ -14,6 +16,7 @@ #include "platform.h" static const char *partition = "common"; +static const char *sysparams_dir = "/sys/firmware/opal/sysparams"; struct param { char *name; @@ -504,6 +507,103 @@ static int update_config(struct platform_powerpc *platform, return write_nvram(platform); } +static void set_exclusive_devtype(struct config *config, + enum device_type devtype) +{ + config->n_boot_priorities = 2; + config->boot_priorities = talloc_realloc(config, + config->boot_priorities, struct boot_priority, + config->n_boot_priorities); + config->boot_priorities[0].type = devtype; + config->boot_priorities[0].priority = 0; + config->boot_priorities[1].type = DEVICE_TYPE_ANY; + config->boot_priorities[1].priority = -1; +} + +/* bootdev options that we recognise */ +enum ipmi_bootdev { + IPMI_BOOTDEV_NONE = 0x00, + IPMI_BOOTDEV_NETWORK = 0x01, + IPMI_BOOTDEV_DISK = 0x2, + IPMI_BOOTDEV_CDROM = 0x5, + IPMI_BOOTDEV_SETUP = 0x6, +}; + +static int read_bootdev_sysparam(const char *name, uint8_t *val) +{ + uint8_t buf[2]; + char path[50]; + int fd, rc; + + strcpy(path, sysparams_dir); + assert(strlen(name) < sizeof(path) - strlen(path)); + strcat(path, name); + + fd = open(path, O_RDONLY); + if (fd < 0) + return -1; + + rc = read(fd, buf, sizeof(buf)); + + close(fd); + + /* bootdev definitions should only be one byte in size */ + if (rc != 1) + return -1; + + switch (buf[0]) { + default: + return -1; + case IPMI_BOOTDEV_NONE: + case IPMI_BOOTDEV_NETWORK: + case IPMI_BOOTDEV_DISK: + case IPMI_BOOTDEV_CDROM: + case IPMI_BOOTDEV_SETUP: + *val = buf[0]; + } + + return 0; +} + +static void parse_opal_sysparams(struct config *config) +{ + uint8_t next_bootdev, default_bootdev; + bool next_valid, default_valid; + int rc; + + rc = read_bootdev_sysparam("next-boot-device", &next_bootdev); + next_valid = rc == 0; + + rc = read_bootdev_sysparam("default-boot-device", &default_bootdev); + default_valid = rc == 0; + + /* nothing valid? no need to change the config */ + if (!next_valid && !default_valid) + return; + + if (!next_valid) + next_bootdev = default_bootdev; + + /* todo: copy default to next */ + + switch (next_bootdev) { + case IPMI_BOOTDEV_NONE: + return; + case IPMI_BOOTDEV_DISK: + set_exclusive_devtype(config, DEVICE_TYPE_DISK); + break; + case IPMI_BOOTDEV_NETWORK: + set_exclusive_devtype(config, DEVICE_TYPE_NETWORK); + break; + case IPMI_BOOTDEV_CDROM: + set_exclusive_devtype(config, DEVICE_TYPE_OPTICAL); + break; + case IPMI_BOOTDEV_SETUP: + config->autoboot_enabled = false; + break; + } +} + static int load_config(struct platform *p, struct config *config) { struct platform_powerpc *platform = to_platform_powerpc(p); @@ -515,6 +615,8 @@ static int load_config(struct platform *p, struct config *config) populate_config(platform, config); + parse_opal_sysparams(config); + return 0; } |
