^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * init.c: PROM library initialisation code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 1998 Harald Koerfgen
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2002, 2004 Maciej W. Rozycki
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/linkage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/bootinfo.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/cpu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/cpu-type.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/processor.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/dec/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) int (*__rex_bootinit)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) int (*__rex_bootread)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) int (*__rex_getbitmap)(memmap *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) unsigned long *(*__rex_slot_address)(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) void *(*__rex_gettcinfo)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int (*__rex_getsysid)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) void (*__rex_clear_cache)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int (*__prom_getchar)(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) char *(*__prom_getenv)(char *);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) int (*__prom_printf)(char *, ...);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int (*__pmax_open)(char*, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) int (*__pmax_lseek)(int, long, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int (*__pmax_read)(int, void *, int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int (*__pmax_close)(int);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * Detect which PROM the DECSTATION has, and set the callback vectors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * appropriately.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) void __init which_prom(s32 magic, s32 *prom_vec)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * No sign of the REX PROM's magic number means we assume a non-REX
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * machine (i.e. we're on a DS2100/3100, DS5100 or DS5000/2xx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) if (prom_is_rex(magic)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * Set up prom abstraction structure with REX entry points.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) __rex_bootinit =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) (void *)(long)*(prom_vec + REX_PROM_BOOTINIT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) __rex_bootread =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) (void *)(long)*(prom_vec + REX_PROM_BOOTREAD);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) __rex_getbitmap =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) (void *)(long)*(prom_vec + REX_PROM_GETBITMAP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) __prom_getchar =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) (void *)(long)*(prom_vec + REX_PROM_GETCHAR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) __prom_getenv =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) (void *)(long)*(prom_vec + REX_PROM_GETENV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) __rex_getsysid =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) (void *)(long)*(prom_vec + REX_PROM_GETSYSID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) __rex_gettcinfo =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) (void *)(long)*(prom_vec + REX_PROM_GETTCINFO);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) __prom_printf =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) (void *)(long)*(prom_vec + REX_PROM_PRINTF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) __rex_slot_address =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) (void *)(long)*(prom_vec + REX_PROM_SLOTADDR);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) __rex_clear_cache =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) (void *)(long)*(prom_vec + REX_PROM_CLEARCACHE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * Set up prom abstraction structure with non-REX entry points.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) __prom_getchar = (void *)PMAX_PROM_GETCHAR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) __prom_getenv = (void *)PMAX_PROM_GETENV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) __prom_printf = (void *)PMAX_PROM_PRINTF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) __pmax_open = (void *)PMAX_PROM_OPEN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) __pmax_lseek = (void *)PMAX_PROM_LSEEK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) __pmax_read = (void *)PMAX_PROM_READ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) __pmax_close = (void *)PMAX_PROM_CLOSE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) void __init prom_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) extern void dec_machine_halt(void);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static const char cpu_msg[] __initconst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) "Sorry, this kernel is compiled for a wrong CPU type!\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) s32 argc = fw_arg0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) s32 *argv = (void *)fw_arg1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) u32 magic = fw_arg2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) s32 *prom_vec = (void *)fw_arg3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) * Determine which PROM we have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * (and therefore which machine we're on!)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) which_prom(magic, prom_vec);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (prom_is_rex(magic))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) rex_clear_cache();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) /* Register the early console. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) register_prom_console();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) /* Were we compiled with the right CPU option? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #if defined(CONFIG_CPU_R3000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if ((current_cpu_type() == CPU_R4000SC) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) (current_cpu_type() == CPU_R4400SC)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static const char r4k_msg[] __initconst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) "Please recompile with \"CONFIG_CPU_R4x00 = y\".\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) printk(cpu_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) printk(r4k_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) dec_machine_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #if defined(CONFIG_CPU_R4X00)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if ((current_cpu_type() == CPU_R3000) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) (current_cpu_type() == CPU_R3000A)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) static const char r3k_msg[] __initconst =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) "Please recompile with \"CONFIG_CPU_R3000 = y\".\n";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) printk(cpu_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) printk(r3k_msg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) dec_machine_halt();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) prom_meminit(magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) prom_identify_arch(magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) prom_init_cmdline(argc, argv, magic);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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