xref: /aosp_15_r20/external/coreboot/util/nvramtool/accessors/cmos-mem.c (revision b9411a12aaaa7e1e6a6fb7c5e057f44ee179a49c) 
1 #include <assert.h>
2 #include "cmos_lowlevel.h"
3 
4 static void mem_hal_init(void* data);
5 static unsigned char mem_hal_read(unsigned addr);
6 static void mem_hal_write(unsigned addr, unsigned char value);
7 static void mem_set_iopl(int level);
8 
9 static unsigned char* mem_hal_data = (unsigned char*)-1;
mem_hal_init(void * data)10 static void mem_hal_init(void *data)
11 {
12 	mem_hal_data = data;
13 }
14 
mem_hal_read(unsigned index)15 static unsigned char mem_hal_read(unsigned index)
16 {
17 	assert(mem_hal_data != (unsigned char*)-1);
18 	return mem_hal_data[index];
19 }
20 
mem_hal_write(unsigned index,unsigned char value)21 static void mem_hal_write(unsigned index, unsigned char value)
22 {
23 	assert(mem_hal_data != (unsigned char*)-1);
24 	mem_hal_data[index] = value;
25 }
26 
mem_set_iopl(int level)27 static void mem_set_iopl(__attribute__ ((unused)) int level)
28 {
29 }
30 
31 cmos_access_t memory_hal = {
32 	.init = mem_hal_init,
33 	.read = mem_hal_read,
34 	.write = mem_hal_write,
35 	.set_iopl = mem_set_iopl,
36 };
37