[J-u-boot.git] / cmd / binop.c

// SPDX-License-Identifier: GPL-2.0+

#include <common.h>
#include <command.h>
#include <hexdump.h>
#include <malloc.h>
#include <mapmem.h>
#include <linux/ctype.h>

enum {
	OP_ID_XOR,
	OP_ID_AND,
	OP_ID_OR,
};

void write_to_env_var(char *varname, u8 *result, ulong len)
{
	char *str_output;
	char *str_ptr;
	int i;

	str_output = malloc(len * 2 + 1);
	str_ptr = str_output;

	for (i = 0; i < len; i++) {
		sprintf(str_ptr, "%02x", result[i]);
		str_ptr += 2;
	}
	*str_ptr = '\0';
	env_set(varname, str_output);

	free(str_output);
}

void read_from_env_var(char *varname, u8 *result)
{
	char *str_value;

	str_value = env_get(varname);
	if (str_value)
		hex2bin(result, str_value, strlen(str_value) / 2);
	else
		hex2bin(result, varname, strlen(varname) / 2);
}

void read_from_mem(ulong addr, u8 *result, ulong len)
{
	u8 *src;

	src = map_sysmem(addr, len);
	memcpy(result, src, len);
	unmap_sysmem(src);
}

void write_to_mem(char *varname, u8 *result, ulong len)
{
	ulong addr;
	u8 *buf;

	addr = simple_strtoul(varname, NULL, 16);
	buf = map_sysmem(addr, len);
	memcpy(buf, result, len);
	unmap_sysmem(buf);
}

static int do_binop(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	ulong len;
	u8 *result, *src1, *src2;
	char *oparg, *lenarg, *src1arg, *src2arg, *destarg;
	int i, op;

	if (argc < 5)
		return CMD_RET_USAGE;

	oparg = argv[1];
	lenarg = argv[2];
	src1arg = argv[3];
	src2arg = argv[4];

	if (!strcmp(oparg, "xor"))
		op = OP_ID_XOR;
	else if (!strcmp(oparg, "or"))
		op = OP_ID_OR;
	else if (!strcmp(oparg, "and"))
		op = OP_ID_AND;
	else
		return CMD_RET_USAGE;

	len = simple_strtoul(lenarg, NULL, 10);

	src1 = malloc(len);
	src2 = malloc(len);

	if (*src1arg == '*')
		read_from_mem(simple_strtoul(src1arg + 1, NULL, 16), src1, len);
	else
		read_from_env_var(src1arg, src1);

	if (*src2arg == '*')
		read_from_mem(simple_strtoul(src2arg + 1, NULL, 16), src2, len);
	else
		read_from_env_var(src2arg, src2);

	result = malloc(len);

	switch (op) {
	case OP_ID_XOR:
		for (i = 0; i < len; i++)
			result[i] = src1[i] ^ src2[i];
		break;
	case OP_ID_OR:
		for (i = 0; i < len; i++)
			result[i] = src1[i] | src2[i];
		break;
	case OP_ID_AND:
		for (i = 0; i < len; i++)
			result[i] = src1[i] & src2[i];
		break;
	}

	if (argc == 5) {
		for (i = 0; i < len; i++) {
			printf("%02x ", result[i]);
			if (i % 16 == 15)
				puts("\n");
		}
		puts("\n");

		goto exit;
	}

	destarg = argv[5];

	if (*destarg == '*')
		write_to_mem(destarg + 1, result, len); /* Skip asterisk */
	else
		write_to_env_var(destarg, result, len);
exit:
	free(result);
	free(src2);
	free(src1);

	return 0;
}

U_BOOT_CMD(
	binop,	6,	1,	do_binop,
	"compute binary operation",
	"op count [*]src1 [*]src2 [[*]dest]\n"
		"    - compute binary operation of data at/in src1 and\n      src2 (either *memaddr, env var name or hex string)\n      and store result in/at dest, where op is one of\n      xor, or, and."
);
Commit	Line	Data
83d290c5	1	// SPDX-License-Identifier: GPL-2.0+
55b25561 MS	2
	3	#include <common.h>
	4	#include <command.h>
32dbe8c5	5	#include <hexdump.h>
55b25561 MS	6	#include <malloc.h>
	7	#include <mapmem.h>
	8	#include <linux/ctype.h>
	9
	10	enum {
	11	OP_ID_XOR,
	12	OP_ID_AND,
	13	OP_ID_OR,
	14	};
	15
	16	void write_to_env_var(char varname, u8 result, ulong len)
	17	{
	18	char *str_output;
	19	char *str_ptr;
	20	int i;
	21
	22	str_output = malloc(len * 2 + 1);
	23	str_ptr = str_output;
	24
	25	for (i = 0; i < len; i++) {
	26	sprintf(str_ptr, "%02x", result[i]);
	27	str_ptr += 2;
	28	}
	29	*str_ptr = '\0';
29dada9c	30	env_set(varname, str_output);
55b25561 MS	31
	32	free(str_output);
	33	}
	34
55b25561 MS	35	void read_from_env_var(char varname, u8 result)
	36	{
	37	char *str_value;
	38
29dada9c	39	str_value = env_get(varname);
55b25561	40	if (str_value)
32dbe8c5	41	hex2bin(result, str_value, strlen(str_value) / 2);
55b25561	42	else
32dbe8c5	43	hex2bin(result, varname, strlen(varname) / 2);
55b25561 MS	44	}
	45
	46	void read_from_mem(ulong addr, u8 *result, ulong len)
	47	{
	48	u8 *src;
	49
	50	src = map_sysmem(addr, len);
	51	memcpy(result, src, len);
	52	unmap_sysmem(src);
	53	}
	54
	55	void write_to_mem(char varname, u8 result, ulong len)
	56	{
	57	ulong addr;
	58	u8 *buf;
	59
	60	addr = simple_strtoul(varname, NULL, 16);
	61	buf = map_sysmem(addr, len);
	62	memcpy(buf, result, len);
	63	unmap_sysmem(buf);
	64	}
	65
	66	static int do_binop(cmd_tbl_t cmdtp, int flag, int argc, char const argv[])
	67	{
	68	ulong len;
	69	u8 result, src1, *src2;
	70	char oparg, lenarg, src1arg, src2arg, *destarg;
	71	int i, op;
	72
	73	if (argc < 5)
	74	return CMD_RET_USAGE;
	75
	76	oparg = argv[1];
	77	lenarg = argv[2];
	78	src1arg = argv[3];
	79	src2arg = argv[4];
	80
	81	if (!strcmp(oparg, "xor"))
	82	op = OP_ID_XOR;
	83	else if (!strcmp(oparg, "or"))
	84	op = OP_ID_OR;
	85	else if (!strcmp(oparg, "and"))
	86	op = OP_ID_AND;
	87	else
	88	return CMD_RET_USAGE;
	89
	90	len = simple_strtoul(lenarg, NULL, 10);
	91
	92	src1 = malloc(len);
	93	src2 = malloc(len);
	94
	95	if (src1arg == '')
	96	read_from_mem(simple_strtoul(src1arg + 1, NULL, 16), src1, len);
	97	else
	98	read_from_env_var(src1arg, src1);
	99
	100	if (src2arg == '')
	101	read_from_mem(simple_strtoul(src2arg + 1, NULL, 16), src2, len);
	102	else
	103	read_from_env_var(src2arg, src2);
	104
	105	result = malloc(len);
	106
	107	switch (op) {
108	case OP_ID_XOR:
109	for (i = 0; i < len; i++)
110	result[i] = src1[i] ^ src2[i];
111	break;
112	case OP_ID_OR:
113	for (i = 0; i < len; i++)
114	result[i] = src1[i] \| src2[i];
115	break;
116	case OP_ID_AND:
117	for (i = 0; i < len; i++)
118	result[i] = src1[i] & src2[i];
119	break;
120	}
121
122	if (argc == 5) {
123	for (i = 0; i < len; i++) {
124	printf("%02x ", result[i]);
125	if (i % 16 == 15)
126	puts("\n");
127	}
128	puts("\n");
129
130	goto exit;
131	}
132
133	destarg = argv[5];
134
135	if (destarg == '')
136	write_to_mem(destarg + 1, result, len); /* Skip asterisk */
137	else
138	write_to_env_var(destarg, result, len);
139	exit:
140	free(result);
141	free(src2);
142	free(src1);
143
144	return 0;
145	}
146
147	U_BOOT_CMD(
148	binop, 6, 1, do_binop,
149	"compute binary operation",
150	"op count []src1 []src2 [[*]dest]\n"
151	" - compute binary operation of data at/in src1 and\n src2 (either *memaddr, env var name or hex string)\n and store result in/at dest, where op is one of\n xor, or, and."
152	);