Changeset 69c1995 in mainline for kernel/arch/arm32/src/cpu/cpu.c


Ignore:
Timestamp:
2012-11-29T12:53:45Z (11 years ago)
Author:
Jan Vesely <jano.vesely@…>
Branches:
lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
Children:
e80d8f8
Parents:
3194d83 (diff), ce60be1 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge ARM fpu hw support.

File:
1 edited

Legend:

Unmodified
Added
Removed

  • kernel/arch/arm32/src/cpu/cpu.c

    r3194d83 r69c1995  
    3939#include <print.h>
    4040
    41 /** Number of indexes left out in the #imp_data array */
    42 #define IMP_DATA_START_OFFSET 0x40
    43 
    44 /** Implementators (vendor) names */
    45 static const char *imp_data[] = {
    46         "?",                                     /* IMP_DATA_START_OFFSET */
    47         "ARM Limited",                           /* 0x41 */
    48         "", "",                                  /* 0x42 - 0x43 */
    49         "Digital Equipment Corporation",         /* 0x44 */
    50         "", "", "", "", "", "", "", "",          /* 0x45 - 0x4c */
    51         "Motorola, Freescale Semicondutor Inc.", /* 0x4d */
    52         "", "", "",                              /* 0x4e - 0x50 */
    53         "Qualcomm Inc.",                         /* 0x51 */
    54         "", "", "", "",                          /* 0x52 - 0x55 */
    55         "Marvell Semiconductor",                 /* 0x56 */
    56         "", "", "", "", "", "", "", "", "", "",  /* 0x57 - 0x60 */
    57         "", "", "", "", "", "", "", "",          /* 0x61 - 0x68 */
    58         "Intel Corporation"                      /* 0x69 */
    59 };
    60 
    61 /** Length of the #imp_data array */
    62 static unsigned int imp_data_length = sizeof(imp_data) / sizeof(char *);
     41/** Implementers (vendor) names */
     42static const char * implementer(unsigned id)
     43{
     44        switch (id)
     45        {
     46        case 0x41: return "ARM Limited";
     47        case 0x44: return "Digital Equipment Corporation";
     48        case 0x4d: return "Motorola, Freescale Semiconductor Inc.";
     49        case 0x51: return "Qualcomm Inc.";
     50        case 0x56: return "Marvell Semiconductor Inc.";
     51        case 0x69: return "Intel Corporation";
     52        }
     53        return "Unknown implementer";
     54}
    6355
    6456/** Architecture names */
    65 static const char *arch_data[] = {
    66         "?",       /* 0x0 */
    67         "4",       /* 0x1 */
    68         "4T",      /* 0x2 */
    69         "5",       /* 0x3 */
    70         "5T",      /* 0x4 */
    71         "5TE",     /* 0x5 */
    72         "5TEJ",    /* 0x6 */
    73         "6"        /* 0x7 */
    74 };
    75 
    76 /** Length of the #arch_data array */
    77 static unsigned int arch_data_length = sizeof(arch_data) / sizeof(char *);
     57static const char * architecture_string(cpu_arch_t *arch)
     58{
     59        static const char *arch_data[] = {
     60                "ARM",       /* 0x0 */
     61                "ARMv4",       /* 0x1 */
     62                "ARMv4T",      /* 0x2 */
     63                "ARMv5",       /* 0x3 */
     64                "ARMv5T",      /* 0x4 */
     65                "ARMv5TE",     /* 0x5 */
     66                "ARMv5TEJ",    /* 0x6 */
     67                "ARMv6"        /* 0x7 */
     68        };
     69        if (arch->arch_num < (sizeof(arch_data) / sizeof(arch_data[0])))
     70                return arch_data[arch->arch_num];
     71        else
     72                return arch_data[0];
     73}
    7874
    7975
    8076/** Retrieves processor identification from CP15 register 0.
    81  * 
     77 *
    8278 * @param cpu Structure for storing CPU identification.
     79 * See page B4-1630 of ARM Architecture Reference Manual.
    8380 */
    8481static void arch_cpu_identify(cpu_arch_t *cpu)
    … …  
    9592        cpu->prim_part_num = (ident << 16) >> 20;
    9693        cpu->rev_num = (ident << 28) >> 28;
     94        // TODO CPUs with arch_num == 0xf use CPUID scheme for identification
    9795}
    9896
    … …  
    136134        );
    137135#endif
     136#ifdef CONFIG_FPU
     137        fpu_setup();
     138#endif
    138139}
    139140
    … …  
    147148void cpu_print_report(cpu_t *m)
    148149{
    149         const char *vendor = imp_data[0];
    150         const char *architecture = arch_data[0];
    151         cpu_arch_t * cpu_arch = &m->arch;
    152 
    153         const unsigned imp_offset = cpu_arch->imp_num - IMP_DATA_START_OFFSET;
    154 
    155         if (imp_offset < imp_data_length) {
    156                 vendor = imp_data[cpu_arch->imp_num - IMP_DATA_START_OFFSET];
    157         }
    158 
    159         // TODO CPUs with arch_num == 0xf use CPUID scheme for identification
    160         if (cpu_arch->arch_num < arch_data_length) {
    161                 architecture = arch_data[cpu_arch->arch_num];
    162         }
    163 
    164         printf("cpu%d: vendor=%s, architecture=ARM%s, part number=%x, "
     150        printf("cpu%d: vendor=%s, architecture=%s, part number=%x, "
    165151            "variant=%x, revision=%x\n",
    166             m->id, vendor, architecture, cpu_arch->prim_part_num,
    167             cpu_arch->variant_num, cpu_arch->rev_num);
     152            m->id, implementer(m->arch.imp_num),
     153            architecture_string(&m->arch), m->arch.prim_part_num,
     154            m->arch.variant_num, m->arch.rev_num);
    168155}
    169156
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