Add cmos helper functions for reading/writing a dword

[coreboot.git] / src / include / pc80 / mc146818rtc.h

diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h
index 032e3858bf8312f4467240e8ee8caf2657a61199..24dac2c098dcc39aad769fabd141b82457440813 100644 (file)
--- a/src/include/pc80/mc146818rtc.h
+++ b/src/include/pc80/mc146818rtc.h
@@ -104,21 +104,39 @@ static inline void cmos_write(unsigned char val, unsigned char addr)
        outb(addr, RTC_BASE_PORT + offs + 0);
        outb(val, RTC_BASE_PORT + offs + 1);
 }
+
+static inline u32 cmos_read32(u8 offset)
+{
+       u32 value = 0;
+       u8 i;
+       for (i = 0; i < sizeof(value); ++i)
+               value |= cmos_read(offset + i) << (i << 3);
+       return value;
+}
+
+static inline void cmos_write32(u8 offset, u32 value)
+{
+       u8 i;
+       for (i = 0; i < sizeof(value); ++i)
+               cmos_write((value >> (i << 3)) & 0xff, offset + i);
+}
 #endif
 
 #if !defined(__ROMCC__)
 void rtc_init(int invalid);
 #if CONFIG_USE_OPTION_TABLE
+int set_option(const char *name, void *val);
 int get_option(void *dest, const char *name);
-unsigned read_option(unsigned start, unsigned size, unsigned def);
+unsigned read_option_lowlevel(unsigned start, unsigned size, unsigned def);
 #else
+static inline int set_option(const char *name __attribute__((unused)), void *val __attribute__((unused))) { return -2; };
 static inline int get_option(void *dest __attribute__((unused)),
        const char *name __attribute__((unused))) { return -2; }
-static inline unsigned read_option(unsigned start, unsigned size, unsigned def)
-       { return def; }
+#define read_option_lowlevel(start, size, def) def
 #endif
 #else
 #include <pc80/mc146818rtc_early.c>
 #endif
+#define read_option(name, default) read_option_lowlevel(CMOS_VSTART_ ##name, CMOS_VLEN_ ##name, (default))
 
 #endif /*  PC80_MC146818RTC_H */