^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) * arch/sh/kernel/machvec.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * The SuperH machine vector setup handlers, yanked from setup.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1999 Niibe Yutaka
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (C) 2002 - 2007 Paul Mundt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <asm/machvec.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/addrspace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/setup.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/irq.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) #define MV_NAME_SIZE 32
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #define for_each_mv(mv) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) for ((mv) = (struct sh_machine_vector *)&__machvec_start; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) (mv) && (unsigned long)(mv) < (unsigned long)&__machvec_end; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) (mv)++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static struct sh_machine_vector * __init get_mv_byname(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct sh_machine_vector *mv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) for_each_mv(mv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) if (strcasecmp(name, mv->mv_name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return mv;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static unsigned int __initdata machvec_selected;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int __init early_parse_mv(char *from)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) char mv_name[MV_NAME_SIZE] = "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) char *mv_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) char *mv_comma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) int mv_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct sh_machine_vector *mvp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) mv_end = strchr(from, ' ');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (mv_end == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) mv_end = from + strlen(from);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) mv_comma = strchr(from, ',');
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) mv_len = mv_end - from;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if (mv_len > (MV_NAME_SIZE-1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) mv_len = MV_NAME_SIZE-1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) memcpy(mv_name, from, mv_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) mv_name[mv_len] = '\0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) from = mv_end;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) machvec_selected = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* Boot with the generic vector */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if (strcmp(mv_name, "generic") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) mvp = get_mv_byname(mv_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) if (unlikely(!mvp)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) pr_info("Available vectors:\n\n\t'%s', ", sh_mv.mv_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) for_each_mv(mvp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) pr_cont("'%s', ", mvp->mv_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) pr_cont("\n\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) panic("Failed to select machvec '%s' -- halting.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) mv_name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) sh_mv = *mvp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) early_param("sh_mv", early_parse_mv);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) void __init sh_mv_setup(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * Only overload the machvec if one hasn't been selected on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * the command line with sh_mv=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) if (!machvec_selected) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) unsigned long machvec_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) machvec_size = ((unsigned long)&__machvec_end -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) (unsigned long)&__machvec_start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) * Sanity check for machvec section alignment. Ensure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) * __initmv hasn't been misused.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (machvec_size % sizeof(struct sh_machine_vector))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) panic("machvec misaligned, invalid __initmv use?");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) * If the machvec hasn't been preselected, use the first
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) * vector (usually the only one) from .machvec.init.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (machvec_size >= sizeof(struct sh_machine_vector))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) sh_mv = *(struct sh_machine_vector *)&__machvec_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) pr_notice("Booting machvec: %s\n", get_system_type());
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) * Manually walk the vec, fill in anything that the board hasn't yet
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) * by hand, wrapping to the generic implementation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #define mv_set(elem) do { \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) if (!sh_mv.mv_##elem) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) sh_mv.mv_##elem = generic_##elem; \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) } while (0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) mv_set(irq_demux);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) mv_set(mode_pins);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) mv_set(mem_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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