diff options
Diffstat (limited to 'hwaccess.c')
| -rw-r--r-- | hwaccess.c | 19 |
1 files changed, 7 insertions, 12 deletions
@@ -65,31 +65,25 @@ static inline void sync_primitive(void) #endif } +#if IS_X86 && !(defined(__DJGPP__) || defined(__LIBPAYLOAD__)) static int release_io_perms(void *p) { -#if IS_X86 -#if defined(__DJGPP__) || defined(__LIBPAYLOAD__) - /* Nothing to release */ -#elif defined (__sun) +#if defined (__sun) sysi86(SI86V86, V86SC_IOPL, 0); #elif IS_BSD close(io_fd); #elif IS_LINUX iopl(0); #endif -#else -/* PCI port I/O support is unimplemented on PPC/MIPS and unavailable on ARM. */ -#endif return 0; } +#endif /* Get I/O permissions with automatic permission release on shutdown. */ int rget_io_perms(void) { -#if IS_X86 -#if defined(__DJGPP__) || defined(__LIBPAYLOAD__) - /* We have full permissions by default. */ -#elif defined (__sun) +#if IS_X86 && !(defined(__DJGPP__) || defined(__LIBPAYLOAD__)) +#if defined (__sun) if (sysi86(SI86V86, V86SC_IOPL, PS_IOPL) != 0) { #elif IS_BSD if ((io_fd = open("/dev/io", O_RDWR)) < 0) { @@ -107,7 +101,8 @@ int rget_io_perms(void) register_shutdown(release_io_perms, NULL); } #else -/* PCI port I/O support is unimplemented on PPC/MIPS and unavailable on ARM. */ + /* DJGPP and libpayload environments have full PCI port I/O permissions by default. */ + /* PCI port I/O support is unimplemented on PPC/MIPS and unavailable on ARM. */ #endif return 0; } |