diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/arm/ioperm.c')
| -rw-r--r-- | sysdeps/unix/sysv/linux/arm/ioperm.c | 95 |
1 files changed, 3 insertions, 92 deletions
diff --git a/sysdeps/unix/sysv/linux/arm/ioperm.c b/sysdeps/unix/sysv/linux/arm/ioperm.c index 053d53b3f6..15650088f8 100644 --- a/sysdeps/unix/sysv/linux/arm/ioperm.c +++ b/sysdeps/unix/sysv/linux/arm/ioperm.c @@ -37,7 +37,6 @@ #include <stdio.h> #include <ctype.h> #include <stdlib.h> -#include <string.h> #include <unistd.h> #include <sys/types.h> @@ -45,9 +44,6 @@ #include <sys/sysctl.h> -#define PATH_ARM_SYSTYPE "/etc/arm_systype" -#define PATH_CPUINFO "/proc/cpuinfo" - #define MAX_PORT 0x10000 static struct { @@ -57,47 +53,16 @@ static struct { unsigned int initdone; /* since all the above could be 0 */ } io; -#define IO_BASE_FOOTBRIDGE 0x7c000000 -#define IO_SHIFT_FOOTBRIDGE 0 - -static struct platform { - const char *name; - unsigned long int io_base; - unsigned int shift; -} platform[] = { - /* All currently supported platforms are in fact the same. :-) */ - {"Chalice-CATS", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE}, - {"DEC-EBSA285", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE}, - {"Corel-NetWinder", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE}, - {"Rebel-NetWinder", IO_BASE_FOOTBRIDGE, IO_SHIFT_FOOTBRIDGE}, -}; - #define IO_ADDR(port) (io.base + ((port) << io.shift)) /* - * Initialize I/O system. There are several ways to get the information - * we need. Each is tried in turn until one succeeds. - * - * 1. Sysctl (CTL_BUS, CTL_BUS_ISA, ISA_*). This is the preferred method - * but not all kernels support it. - * - * 2. Read the value (not the contents) of symlink PATH_ARM_SYSTYPE. - * - If it matches one of the entries in the table above, use the - * corresponding values. - * - If it begins with a number, assume this is a previously - * unsupported system and the values encode, in order, - * "<io_base>,<port_shift>". - * - * 3. Lookup the "system type" field in /proc/cpuinfo. Again, if it - * matches an entry in the platform[] table, use the corresponding - * values. + * Initialize I/O system. The io_bae and port_shift values are fetched + * using sysctl (CTL_BUS, CTL_BUS_ISA, ISA_*). */ static int init_iosys (void) { - char systype[256]; - int i, n; static int iobase_name[] = { CTL_BUS, CTL_BUS_ISA, BUS_ISA_PORT_BASE }; static int ioshift_name[] = { CTL_BUS, CTL_BUS_ISA, BUS_ISA_PORT_SHIFT }; size_t len = sizeof(io.base); @@ -109,61 +74,7 @@ init_iosys (void) return 0; } - n = __readlink (PATH_ARM_SYSTYPE, systype, sizeof (systype) - 1); - if (n > 0) - { - systype[n] = '\0'; - if (isdigit (systype[0])) - { - if (sscanf (systype, "%li,%i", &io.io_base, &io.shift) == 2) - { - io.initdone = 1; - return 0; - } - /* else we're likely going to fail with the system match below */ - } - } - else - { - FILE * fp; - - fp = fopen (PATH_CPUINFO, "rce"); - if (! fp) - return -1; - while ((n = fscanf (fp, "Hardware\t: %256[^\n]\n", systype)) - != EOF) - { - if (n == 1) - break; - else - fgets_unlocked (systype, 256, fp); - } - fclose (fp); - - if (n == EOF) - { - /* this can happen if the format of /proc/cpuinfo changes... */ - fprintf (stderr, - "ioperm: Unable to determine system type.\n" - "\t(May need " PATH_ARM_SYSTYPE " symlink?)\n"); - __set_errno (ENODEV); - return -1; - } - } - - /* translate systype name into i/o system: */ - for (i = 0; i < sizeof (platform) / sizeof (platform[0]); ++i) - { - if (strcmp (platform[i].name, systype) == 0) - { - io.shift = platform[i].shift; - io.io_base = platform[i].io_base; - io.initdone = 1; - return 0; - } - } - - /* systype is not a known platform name... */ + /* sysctl has failed... */ __set_errno (ENODEV); return -1; } |