2 * PXA CPU information display
4 * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
6 * SPDX-License-Identifier: GPL-2.0+
12 #include <linux/compiler.h>
14 #ifdef CONFIG_CPU_PXA25X
15 #if ((CONFIG_SYS_INIT_SP_ADDR) != 0xfffff800)
16 #error "Init SP address must be set to 0xfffff800 for PXA250"
20 #define CPU_MASK_PXA_PRODID 0x000003f0
21 #define CPU_MASK_PXA_REVID 0x0000000f
23 #define CPU_MASK_PRODREV (CPU_MASK_PXA_PRODID | CPU_MASK_PXA_REVID)
25 #define CPU_VALUE_PXA25X 0x100
26 #define CPU_VALUE_PXA27X 0x110
28 static uint32_t pxa_get_cpuid(void)
31 asm volatile("mrc p15, 0, %0, c0, c0, 0" : "=r"(cpuid));
35 int cpu_is_pxa25x(void)
37 uint32_t id = pxa_get_cpuid();
38 id &= CPU_MASK_PXA_PRODID;
39 return id == CPU_VALUE_PXA25X;
42 int cpu_is_pxa27x(void)
44 uint32_t id = pxa_get_cpuid();
45 id &= CPU_MASK_PXA_PRODID;
46 return id == CPU_VALUE_PXA27X;
49 int cpu_is_pxa27xm(void)
51 uint32_t id = pxa_get_cpuid();
52 return ((id & CPU_MASK_PXA_PRODID) == CPU_VALUE_PXA27X) &&
53 ((id & CPU_MASK_PXA_REVID) == 8);
56 uint32_t pxa_get_cpu_revision(void)
58 return pxa_get_cpuid() & CPU_MASK_PRODREV;
61 #ifdef CONFIG_DISPLAY_CPUINFO
62 static const char *pxa25x_get_revision(void)
64 static __maybe_unused const char * const revs_25x[] = { "A0" };
65 static __maybe_unused const char * const revs_26x[] = {
68 static const char *unknown = "Unknown";
74 id = pxa_get_cpuid() & CPU_MASK_PXA_REVID;
76 /* PXA26x is a sick special case as it can't be told apart from PXA25x :-( */
77 #ifdef CONFIG_CPU_PXA26X
79 case 3: return revs_26x[0];
80 case 5: return revs_26x[1];
81 case 6: return revs_26x[2];
90 static const char *pxa27x_get_revision(void)
92 static const char *const rev[] = { "A0", "A1", "B0", "B1", "C0", "C5" };
93 static const char *unknown = "Unknown";
99 id = pxa_get_cpuid() & CPU_MASK_PXA_REVID;
101 if ((id == 5) || (id == 6) || (id > 8))
104 /* Cap the special PXA270 C5 case. */
108 /* Cap the special PXA270M A1 case. */
115 static int print_cpuinfo_pxa2xx(void)
117 if (cpu_is_pxa25x()) {
118 puts("Marvell PXA25x rev. ");
119 puts(pxa25x_get_revision());
120 } else if (cpu_is_pxa27x()) {
121 puts("Marvell PXA27x");
122 if (cpu_is_pxa27xm()) puts("M");
124 puts(pxa27x_get_revision());
133 int print_cpuinfo(void)
139 ret = print_cpuinfo_pxa2xx();