1 files changed, 66 insertions, 0 deletions
diff --git a/src/compiler.h b/src/compiler.h
new file mode 100644
index 00000000..ba4b83d5
--- /dev/null
+++ b/src/compiler.h
@@ -0,0 +1,66 @@
+#ifndef __COMPILER_H
+#define __COMPILER_H
+// Low level definitions for C languange and gcc compiler.
+
+#define barrier() __asm__ __volatile__("": : :"memory")
+
+#define likely(x)       __builtin_expect(!!(x), 1)
+#define unlikely(x)     __builtin_expect(!!(x), 0)
+
+#define noinline __attribute__((noinline))
+#ifndef __always_inline
+#define __always_inline inline __attribute__((always_inline))
+#endif
+#define __visible __attribute__((externally_visible))
+#define __noreturn __attribute__((noreturn))
+
+#define PACKED __attribute__((packed))
+#define __aligned(x) __attribute__((aligned(x)))
+#define __section(S) __attribute__((section(S)))
+
+#define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0]))
+#define ALIGN(x,a)              __ALIGN_MASK(x,(typeof(x))(a)-1)
+#define __ALIGN_MASK(x,mask)    (((x)+(mask))&~(mask))
+#define ALIGN_DOWN(x,a)         ((x) & ~((typeof(x))(a)-1))
+
+#define container_of(ptr, type, member) ({                      \
+        const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+        (type *)( (char *)__mptr - offsetof(type,member) );})
+
+#define __stringify_1(x)        #x
+#define __stringify(x)          __stringify_1(x)
+
+#define ___PASTE(a,b) a##b
+#define __PASTE(a,b) ___PASTE(a,b)
+
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+#define DIV_ROUND_CLOSEST(x, divisor)({                 \
+            typeof(divisor) __divisor = divisor;        \
+            (((x) + ((__divisor) / 2)) / (__divisor));  \
+        })
+
+union u32_u16_u {
+    struct { uint16_t lo, hi; };
+    uint32_t val;
+};
+
+static inline void writel(void *addr, uint32_t val) {
+    *(volatile uint32_t *)addr = val;
+}
+static inline void writew(void *addr, uint16_t val) {
+    *(volatile uint16_t *)addr = val;
+}
+static inline void writeb(void *addr, uint8_t val) {
+    *(volatile uint8_t *)addr = val;
+}
+static inline uint32_t readl(const void *addr) {
+    return *(volatile const uint32_t *)addr;
+}
+static inline uint16_t readw(const void *addr) {
+    return *(volatile const uint16_t *)addr;
+}
+static inline uint8_t readb(const void *addr) {
+    return *(volatile const uint8_t *)addr;
+}
+
+#endif // compiler.h