diff options
Diffstat (limited to 'include/skiboot.h')
-rw-r--r-- | include/skiboot.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/include/skiboot.h b/include/skiboot.h index 312a436..d1553c4 100644 --- a/include/skiboot.h +++ b/include/skiboot.h @@ -1,5 +1,7 @@ // SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later -/* Copyright 2013-2019 IBM Corp. */ +/* Copyright 2013-2019 IBM Corp. + * Copyright 2021 Stewart Smith + */ #ifndef __SKIBOOT_H #define __SKIBOOT_H @@ -346,4 +348,39 @@ extern int fake_nvram_info(uint32_t *total_size); extern int fake_nvram_start_read(void *dst, uint32_t src, uint32_t len); extern int fake_nvram_write(uint32_t offset, void *src, uint32_t size); +/* + * A bunch of hardware needs to be probed, sometimes in a particular order. + * Very simple dependency graph, with a even simpler way to resolve it. + * But it means we can now at link time choose what hardware we support. + * This struct should not be defined directly but with the macros. + */ +struct hwprobe { + const char *name; + void (*probe)(void); + + bool probed; + + /* NULL or NULL-terminated array of strings */ + const char **deps; +}; + +#define DEFINE_HWPROBE(__name, __probe) \ +static const struct hwprobe __used __section(".hwprobes") hwprobe_##__name = { \ + .name = #__name, \ + .probe = __probe, \ + .deps = NULL, \ +} + +#define DEFINE_HWPROBE_DEPS(__name, __probe, ...) \ +static const struct hwprobe __used __section(".hwprobes") hwprobe_##__name = { \ + .name = #__name, \ + .probe = __probe, \ + .deps = (const char *[]){ __VA_ARGS__, NULL}, \ +} + +extern struct hwprobe __hwprobes_start; +extern struct hwprobe __hwprobes_end; + +extern void probe_hardware(void); + #endif /* __SKIBOOT_H */ |