rework structure

bare-metal-bsp/include/rtl/bits.h

@@ -0,0 +1,35 @@
+#ifndef _RISCV_BITS_H
+#define _RISCV_BITS_H
+
+#define likely(x) __builtin_expect((x), 1)
+#define unlikely(x) __builtin_expect((x), 0)
+
+#define ROUNDUP(a, b) ((((a)-1)/(b)+1)*(b))
+#define ROUNDDOWN(a, b) ((a)/(b)*(b))
+
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define CLAMP(a, lo, hi) MIN(MAX(a, lo), hi)
+
+#define EXTRACT_FIELD(val, which) (((val) & (which)) / ((which) & ~((which)-1)))
+#define INSERT_FIELD(val, which, fieldval) (((val) & ~(which)) | ((fieldval) * ((which) & ~((which)-1))))
+
+#define STR(x) XSTR(x)
+#define XSTR(x) #x
+
+#ifdef __riscv64
+# define SLL32    sllw
+# define STORE    sd
+# define LOAD     ld
+# define LWU      lwu
+# define LOG_REGBYTES 3
+#else
+# define SLL32    sll
+# define STORE    sw
+# define LOAD     lw
+# define LWU      lw
+# define LOG_REGBYTES 2
+#endif
+#define REGBYTES (1 << LOG_REGBYTES)
+
+#endif

bare-metal-bsp/include/rtl/const.h

@@ -0,0 +1,27 @@
+#ifndef _RTL_CONST_H
+#define _RTL_CONST_H
+
+#ifdef __ASSEMBLER__
+#define _AC(X,Y)        X
+#define _AT(T,X)        X
+#else
+#define _AC(X,Y)        (X##Y)
+#define _AT(T,X)        ((T)(X))
+#endif /* !__ASSEMBLER__*/
+
+#define _BITUL(x)       (_AC(1,UL) << (x))
+#define _BITULL(x)      (_AC(1,ULL) << (x))
+
+#define UART0_BASE_ADDR 0xffff0000ULL
+
+#define UART_REG_TXFIFO         0x00
+#define UART_REG_RXFIFO         0x04
+#define UART_REG_TXCTRL         0x08
+#define UART_REG_RXCTRL         0x0c
+#define UART_REG_IE             0x10
+#define UART_REG_IP             0x14
+#define UART_REG_DIV            0x18
+#define UART_TXEN               0x1
+
+#define UART0_REG(ADDR) *((volatile uint32_t*) (UART0_BASE_ADDR + ADDR))
+#endif /* _RTL_CONST_H */

bare-metal-bsp/include/rtl/sections.h

@@ -0,0 +1,16 @@
+#ifndef _SECTIONS_H
+#define _SECTIONS_H
+
+extern unsigned char _rom[];
+extern unsigned char _rom_end[];
+
+extern unsigned char _ram[];
+extern unsigned char _ram_end[];
+
+extern unsigned char _ftext[];
+extern unsigned char _etext[];
+extern unsigned char _fbss[];
+extern unsigned char _ebss[];
+extern unsigned char _end[];
+
+#endif /* _SECTIONS_H */