Force coreboot mconf to create temp files in the output directory

[coreboot.git] / util / nvramtool / cmos_lowlevel.c

diff --git a/util/nvramtool/cmos_lowlevel.c b/util/nvramtool/cmos_lowlevel.c
index 67d561b26761a2c22959e04d89a5716f994f3dbb..58494f9c5849bdf1f45024bb555f3c6be6b37714 100644 (file)
--- a/util/nvramtool/cmos_lowlevel.c
+++ b/util/nvramtool/cmos_lowlevel.c
@@ -36,6 +36,25 @@
 #include "common.h"
 #include "cmos_lowlevel.h"
 
+/* Hardware Abstraction Layer: lowlevel byte-wise write access */
+
+extern cmos_access_t cmos_hal, memory_hal;
+static cmos_access_t *current_access = &cmos_hal;
+
+void select_hal(hal_t hal, void *data)
+{
+       switch(hal) {
+               case HAL_CMOS:
+                       current_access = &cmos_hal;
+                       break;
+               case HAL_MEMORY:
+                       current_access = &memory_hal;
+                       break;
+       }
+       current_access->init(data);
+}
+
+/* Bit-level access */
 typedef struct {
        unsigned byte_index;
        unsigned bit_offset;
@@ -75,7 +94,7 @@ static inline unsigned char get_bits(unsigned long long value, unsigned bit,
 static inline void put_bits(unsigned char value, unsigned bit,
                            unsigned nr_bits, unsigned long long *result)
 {
-       *result += ((unsigned long long)(value & 
+       *result += ((unsigned long long)(value &
                                ((unsigned char)((1 << nr_bits) - 1)))) << bit;
 }
 
@@ -161,7 +180,7 @@ void cmos_write(const cmos_entry_t * e, unsigned long long value)
        } else {
                for (next_bit = 0, bits_left = length;
                     bits_left; next_bit += nr_bits, bits_left -= nr_bits) {
-                       nr_bits = cmos_bit_op_strategy(bit + next_bit, 
+                       nr_bits = cmos_bit_op_strategy(bit + next_bit,
                                        bits_left, &where);
                        cmos_write_bits(&where, nr_bits,
                                        get_bits(value, next_bit, nr_bits));
@@ -181,20 +200,7 @@ void cmos_write(const cmos_entry_t * e, unsigned long long value)
  ****************************************************************************/
 unsigned char cmos_read_byte(unsigned index)
 {
-       unsigned short port_0, port_1;
-
-       assert(!verify_cmos_byte_index(index));
-
-       if (index < 128) {
-               port_0 = 0x70;
-               port_1 = 0x71;
-       } else {
-               port_0 = 0x72;
-               port_1 = 0x73;
-       }
-
-       OUTB(index, port_0);
-       return INB(port_1);
+       return current_access->read(index);
 }
 
 /****************************************************************************
@@ -209,20 +215,7 @@ unsigned char cmos_read_byte(unsigned index)
  ****************************************************************************/
 void cmos_write_byte(unsigned index, unsigned char value)
 {
-       unsigned short port_0, port_1;
-
-       assert(!verify_cmos_byte_index(index));
-
-       if (index < 128) {
-               port_0 = 0x70;
-               port_1 = 0x71;
-       } else {
-               port_0 = 0x72;
-               port_1 = 0x73;
-       }
-
-       OUTB(index, port_0);
-       OUTB(value, port_1);
+       current_access->write(index, value);
 }
 
 /****************************************************************************
@@ -268,34 +261,7 @@ void cmos_write_all(unsigned char data[])
  ****************************************************************************/
 void set_iopl(int level)
 {
-#if defined(__FreeBSD__)
-       static int io_fd = -1;
-#endif
-
-       assert((level >= 0) && (level <= 3));
-
-#if defined(__FreeBSD__)
-       if (level == 0) {
-               if (io_fd != -1) {
-                       close(io_fd);
-                       io_fd = -1;
-               }
-       } else {
-               if (io_fd == -1) {
-                       io_fd = open("/dev/io", O_RDWR);
-                       if (io_fd < 0) {
-                               perror("/dev/io");
-                               exit(1);
-                       }
-               }
-       }
-#else
-       if (iopl(level)) {
-               fprintf(stderr, "%s: iopl() system call failed.  "
-                       "You must be root to do this.\n", prog_name);
-               exit(1);
-       }
-#endif
+       current_access->set_iopl(level);
 }
 
 /****************************************************************************