/* Copyright 2013-2014 IBM Corp. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or * implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef __SKIBOOT_H #define __SKIBOOT_H #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Special ELF sections */ #define __force_data __section(".force.data") /* Readonly section start and end. */ extern char __rodata_start[], __rodata_end[]; static inline bool is_rodata(const void *p) { return ((const char *)p >= __rodata_start && (const char *)p < __rodata_end); } /* Debug descriptor. This structure is pointed to by the word at offset * 0x80 in the sapphire binary */ struct debug_descriptor { u8 eye_catcher[8]; /* "OPALdbug" */ #define DEBUG_DESC_VERSION 1 u32 version; u8 console_log_levels; /* high 4 bits in memory, * low 4 bits driver (e.g. uart). */ u8 reserved1; u16 reserved2; u32 reserved[2]; /* Memory console */ u64 memcons_phys; u32 memcons_tce; u32 memcons_obuf_tce; u32 memcons_ibuf_tce; /* Traces */ u64 trace_mask; u32 num_traces; #define DEBUG_DESC_MAX_TRACES 256 u64 trace_phys[DEBUG_DESC_MAX_TRACES]; u32 trace_size[DEBUG_DESC_MAX_TRACES]; u32 trace_tce[DEBUG_DESC_MAX_TRACES]; }; extern struct debug_descriptor debug_descriptor; /* Console logging */ #define PR_EMERG 0 #define PR_ALERT 1 #define PR_CRIT 2 #define PR_ERR 3 #define PR_WARNING 4 #define PR_NOTICE 5 #define PR_PRINTF PR_NOTICE #define PR_INFO 6 #define PR_DEBUG 7 #define PR_TRACE 8 #define PR_INSANE 9 void prlog(int log_level, const char* fmt, ...) __attribute__((format (printf, 2, 3))); #define prerror(fmt...) do { prlog(PR_ERR, fmt); } while(0) /* Location codes -- at most 80 chars with null termination */ #define LOC_CODE_SIZE 80 enum ipl_state { ipl_initial = 0x00000000, ipl_opl_sent = 0x00000001, ipl_got_continue = 0x00000002, ipl_got_new_role = 0x00000004, ipl_got_caps = 0x00000008, ipl_got_fsp_functional = 0x00000010 }; extern enum ipl_state ipl_state; /* Processor generation */ enum proc_gen { proc_gen_unknown, proc_gen_p7, /* P7 and P7+ */ proc_gen_p8, }; extern enum proc_gen proc_gen; /* Convert a 4-bit number to a hex char */ extern char __attrconst tohex(uint8_t nibble); /* Bit position of the most significant 1-bit (LSB=0, MSB=63) */ static inline int ilog2(unsigned long val) { int left_zeros; asm volatile ("cntlzd %0,%1" : "=r" (left_zeros) : "r" (val)); return 63 - left_zeros; } static inline bool is_pow2(unsigned long val) { return val == (1ul << ilog2(val)); } #define lo32(x) ((x) & 0xffffffff) #define hi32(x) (((x) >> 32) & 0xffffffff) /* WARNING: _a *MUST* be a power of two */ #define ALIGN_UP(_v, _a) (((_v) + (_a) - 1) & ~((_a) - 1)) #define ALIGN_DOWN(_v, _a) ((_v) & ~((_a) - 1)) /* TCE alignment */ #define TCE_SHIFT 12 #define TCE_PSIZE (1ul << 12) #define TCE_MASK (TCE_PSIZE - 1) /* Not the greatest variants but will do for now ... */ #define MIN(a, b) ((a) < (b) ? (a) : (b)) #define MAX(a, b) ((a) > (b) ? (a) : (b)) /* Clean the stray high bit which the FSP inserts: we only have 52 bits real */ static inline u64 cleanup_addr(u64 addr) { return addr & ((1ULL << 52) - 1); } /* Start the kernel */ extern void start_kernel(uint64_t entry, void* fdt, uint64_t mem_top) __noreturn; extern void start_kernel32(uint64_t entry, void* fdt, uint64_t mem_top) __noreturn; extern void start_kernel_secondary(uint64_t entry) __noreturn; /* Get description of machine from HDAT and create device-tree */ extern void parse_hdat(bool is_opal, uint32_t master_cpu); /* Root of device tree. */ extern struct dt_node *dt_root; /* Full skiboot version number (possibly includes gitid). */ extern const char version[]; /* Debug support */ extern char __sym_map_start[]; extern char __sym_map_end[]; extern unsigned long get_symbol(unsigned long addr, char **sym, char **sym_end); /* Fast reboot support */ extern void fast_reset(void); extern void __noreturn __secondary_cpu_entry(void); extern void __noreturn load_and_boot_kernel(bool is_reboot); extern void cleanup_tlb(void); extern void init_shared_sprs(void); extern void init_replicated_sprs(void); /* Various probe routines, to replace with an initcall system */ extern void probe_p5ioc2(void); extern void probe_p7ioc(void); extern void probe_phb3(void); extern void uart_init(bool enable_interrupt); extern void homer_init(void); extern void occ_pstates_init(void); extern void slw_init(void); extern void occ_fsp_init(void); /* flash support */ struct flash_chip; extern int flash_register(struct flash_chip *chip, bool is_system_flash); extern bool flash_load_resource(enum resource_id id, uint32_t subid, void *buf, size_t *len); /* NVRAM support */ extern void nvram_init(void); extern void nvram_read_complete(bool success); /* UART stuff */ extern void uart_irq(void); extern void uart_setup_linux_passthrough(void); extern void uart_setup_opal_console(void); /* OCC interrupt */ extern void occ_interrupt(uint32_t chip_id); extern void occ_send_dummy_interrupt(void); /* OCC load support */ extern void occ_poke_load_queue(void); /* Flatten device-tree */ extern void *create_dtb(const struct dt_node *root); /* SLW reinit function for switching core settings */ extern int64_t slw_reinit(uint64_t flags); /* Fallback fake RTC */ extern void fake_rtc_init(void); #endif /* __SKIBOOT_H */