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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 | // SPDX-License-Identifier: GPL-2.0+ /* * PXA CPU information display * * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com> */ #include <common.h> #include <init.h> #include <asm/io.h> #include <errno.h> #include <linux/compiler.h> #ifdef CONFIG_CPU_PXA25X #if ((CONFIG_SYS_INIT_SP_ADDR) != 0xfffff800) #error "Init SP address must be set to 0xfffff800 for PXA250" #endif #endif #define CPU_MASK_PXA_PRODID 0x000003f0 #define CPU_MASK_PXA_REVID 0x0000000f #define CPU_MASK_PRODREV (CPU_MASK_PXA_PRODID | CPU_MASK_PXA_REVID) #define CPU_VALUE_PXA25X 0x100 #define CPU_VALUE_PXA27X 0x110 static uint32_t pxa_get_cpuid(void) { uint32_t cpuid; asm volatile("mrc p15, 0, %0, c0, c0, 0" : "=r"(cpuid)); return cpuid; } int cpu_is_pxa25x(void) { uint32_t id = pxa_get_cpuid(); id &= CPU_MASK_PXA_PRODID; return id == CPU_VALUE_PXA25X; } int cpu_is_pxa27x(void) { uint32_t id = pxa_get_cpuid(); id &= CPU_MASK_PXA_PRODID; return id == CPU_VALUE_PXA27X; } int cpu_is_pxa27xm(void) { uint32_t id = pxa_get_cpuid(); return ((id & CPU_MASK_PXA_PRODID) == CPU_VALUE_PXA27X) && ((id & CPU_MASK_PXA_REVID) == 8); } uint32_t pxa_get_cpu_revision(void) { return pxa_get_cpuid() & CPU_MASK_PRODREV; } #ifdef CONFIG_DISPLAY_CPUINFO static const char *pxa25x_get_revision(void) { static __maybe_unused const char * const revs_25x[] = { "A0" }; static __maybe_unused const char * const revs_26x[] = { "A0", "B0", "B1" }; static const char *unknown = "Unknown"; uint32_t id; if (!cpu_is_pxa25x()) return unknown; id = pxa_get_cpuid() & CPU_MASK_PXA_REVID; /* PXA26x is a sick special case as it can't be told apart from PXA25x :-( */ #ifdef CONFIG_CPU_PXA26X switch (id) { case 3: return revs_26x[0]; case 5: return revs_26x[1]; case 6: return revs_26x[2]; } #else if (id == 6) return revs_25x[0]; #endif return unknown; } static const char *pxa27x_get_revision(void) { static const char *const rev[] = { "A0", "A1", "B0", "B1", "C0", "C5" }; static const char *unknown = "Unknown"; uint32_t id; if (!cpu_is_pxa27x()) return unknown; id = pxa_get_cpuid() & CPU_MASK_PXA_REVID; if ((id == 5) || (id == 6) || (id > 8)) return unknown; /* Cap the special PXA270 C5 case. */ if (id == 7) id = 5; /* Cap the special PXA270M A1 case. */ if (id == 8) id = 1; return rev[id]; } static int print_cpuinfo_pxa2xx(void) { if (cpu_is_pxa25x()) { puts("Marvell PXA25x rev. "); puts(pxa25x_get_revision()); } else if (cpu_is_pxa27x()) { puts("Marvell PXA27x"); if (cpu_is_pxa27xm()) puts("M"); puts(" rev. "); puts(pxa27x_get_revision()); } else return -EINVAL; puts("\n"); return 0; } int print_cpuinfo(void) { int ret; puts("CPU: "); ret = print_cpuinfo_pxa2xx(); if (!ret) return ret; return ret; } #endif |