Timeout for Z180 bus access

[z180-stamp.git] / avr / cmd_mem.c

/*
 * (C) Copyright 2000
 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

/*
 * Memory Functions
 *
 * Copied from FADS ROM, Dan Malek (dmalek@jlc.net)
 */

#include "common.h"
#include <stdlib.h>
#include <ctype.h>

#include "command.h"
#include "cli_readline.h"
#include "print-utils.h"
#include "con-utils.h"
#include "z80-if.h"
//#include "debug.h"


#ifndef CONFIG_SYS_MEMTEST_SCRATCH
#define CONFIG_SYS_MEMTEST_SCRATCH 0
#endif

/* Display values from last command.
 * Memory modify remembered values are different from display memory.
 */
static uint32_t	dp_last_addr;
static uint32_t	dp_last_length = 0x100;
static uint32_t	mm_last_addr;

static	uint32_t	base_address = 0;

/*--------------------------------------------------------------------------*/


void z180_read_buf(uint8_t *buf, uint32_t addr, uint8_t count)
{
		if (z80_bus_cmd(Request) & ZST_ACQUIRED) {
			z80_read_block (buf, addr, count);
			z80_bus_cmd(Release);
		}
}

/*--------------------------------------------------------------------------*/

/* Memory Display
 *
 * Syntax:
 *	md {addr} {len}
 */
command_ret_t do_mem_md(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint32_t addr, length;

	(void) cmdtp;

#if 0
	printf_P(PSTR("flag: %d, argc: %d"), flag, argc);
	for (int i = 0; i < argc; i++) {
		printf_P(PSTR(", argv[%d]: %s"), i, argv[i] ? argv[i] : "<NULL>");
	}
	putchar('\n');
#endif

	/* We use the last specified parameters, unless new ones are
	 * entered.
	 */
	addr = dp_last_addr;
	length = dp_last_length;

	if (argc < 2)
		return CMD_RET_USAGE;

	if ((flag & CMD_FLAG_REPEAT) == 0) {
		/* Address is specified since argc > 1 */
		addr = strtoul(argv[1], NULL, 16);
		addr += base_address;

		/* If another parameter, it is the length to display. */
		if (argc > 2)
			length = strtoul(argv[2], NULL, 16);
	}

	/* Print the lines. */
	dump_mem(addr, addr, length, z180_read_buf, NULL);

	dp_last_addr = addr + length;
	dp_last_length = length;
	return CMD_RET_SUCCESS;
}

/* Modify memory.
 *
 * Syntax:
 *	mm {addr}
 *	nm {addr}
 */
static command_ret_t
mod_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const argv[])
{
	uint32_t addr;
	uint8_t data;
	int nbytes;

	(void) cmdtp;

	if (argc != 2)
		return CMD_RET_USAGE;

	/* We use the last specified parameters, unless new ones are
	 * entered.
	 */
	addr = mm_last_addr;

	if ((flag & CMD_FLAG_REPEAT) == 0) {
		/* New command specified.
		 */

		/* Address is specified since argc > 1
		*/
		addr = strtoul(argv[1], NULL, 16);
		addr += base_address;
	}

	/* Print the address, followed by value.  Then accept input for
	 * the next value.  A non-converted value exits.
	 */
	do {
		if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
			my_puts_P(PSTR("Bus timeout\n"));
			return  CMD_RET_FAILURE;
		}
		data = z80_read(addr);
		z80_bus_cmd(Release);
		printf_P(PSTR("%05lx: %02x"), addr, data);

		nbytes = cli_readline(PSTR(" ? "));
		if (nbytes == 0 || (nbytes == 1 && console_buffer[0] == '-')) {
			/* <CR> pressed as only input, don't modify current
			 * location and move to next. "-" pressed will go back.
			 */
			if (incrflag)
				addr += nbytes ? -1 : 1;
			nbytes = 1;
		}
		else {
			char *endp;
			data = strtoul(console_buffer, &endp, 16);
			nbytes = endp - console_buffer;
			if (nbytes) {
				if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
					my_puts_P(PSTR("Bus timeout\n"));
					return  CMD_RET_FAILURE;
				}
				z80_write(addr, data);
				z80_bus_cmd(Release);
				if (incrflag)
					addr++;
			}
		}
	} while (nbytes);

	mm_last_addr = addr;
	return CMD_RET_SUCCESS;
}


command_ret_t do_mem_mm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	return mod_mem (cmdtp, 1, flag, argc, argv);
}
command_ret_t do_mem_nm(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	return mod_mem (cmdtp, 0, flag, argc, argv);
}

command_ret_t do_mem_mw(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint8_t writeval;
	uint32_t addr, count;

	(void) cmdtp;
	(void) flag;

	if ((argc < 3) || (argc > 4))
		return CMD_RET_USAGE;

	/* Address is specified since argc > 1
	*/
	addr = strtoul(argv[1], NULL, 16);
	addr += base_address;

	/* Get the value to write.
	*/
	writeval = (uint8_t) strtoul(argv[2], NULL, 16);

	/* Count ? */
	if (argc == 4) {
		count = strtoul(argv[3], NULL, 16);
	} else {
		count = 1;
	}

	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
		my_puts_P(PSTR("Bus timeout\n"));
		return  CMD_RET_FAILURE;
	}
	z80_memset(addr, writeval, count);
	z80_bus_cmd(Release);

	return CMD_RET_SUCCESS;
}

#ifdef CONFIG_MX_CYCLIC
command_ret_t do_mem_mdc ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	int i;
	uint32_t count;

	if (argc < 4)
		return CMD_RET_USAGE;

	count = strtoul(argv[3], NULL, 10);

	for (;;) {
		do_mem_md (NULL, 0, 3, argv);

		/* delay for <count> ms... */
/* TODO: use timer */
		for (i=0; i<count; i++)
			udelay (1000);

		/* check for ctrl-c to abort... */
		if (ctrlc()) {
			my_puts_P(PSTR("Abort\n"));
			return CMD_RET_SUCCESS;
		}
	}

	return CMD_RET_SUCCESS;
}

command_ret_t do_mem_mwc ( cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	int i;
	uint32_t count;

	if (argc < 4)
		return CMD_RET_USAGE;

	count = strtoul(argv[3], NULL, 10);

	for (;;) {
		do_mem_mw (NULL, 0, 3, argv);

		/* delay for <count> ms... */
/* TODO: use timer */
		for (i=0; i<count; i++)
			udelay (1000);

		/* check for ctrl-c to abort... */
		if (ctrlc()) {
			my_puts_P(PSTR("Abort\n"));
			return CMD_RET_SUCCESS;
		}
	}

	return CMD_RET_SUCCESS;
}
#endif /* CONFIG_MX_CYCLIC */

command_ret_t do_mem_cmp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint32_t addr1, addr2, count, ngood;
	command_ret_t rcode = CMD_RET_SUCCESS;
	uint8_t byte1, byte2;

	(void) cmdtp;
	(void) flag;

	if (argc != 4)
		return CMD_RET_USAGE;


	addr1 = strtoul(argv[1], NULL, 16);
	addr1 += base_address;
	addr2 = strtoul(argv[2], NULL, 16);
	addr2 += base_address;
	count = strtoul(argv[3], NULL, 16);

	for (ngood = 0; ngood < count; ++ngood) {
		if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
			my_puts_P(PSTR("Bus timeout\n"));
			rcode =  CMD_RET_FAILURE;
			break;
		}
		byte1 = z80_read(addr1);
		byte2 = z80_read(addr2);
		z80_bus_cmd(Release);
		if (byte1 != byte2) {
			printf_P(PSTR("byte at 0x%05lx (%#02x) != "
				"byte at 0x%05lx (%#02x)\n"),
				addr1, byte1, addr2, byte2);
			rcode = CMD_RET_FAILURE;
			break;
		}
		addr1++;
		addr2++;

		/* check for ctrl-c to abort... */
		if (ctrlc()) {
			my_puts_P(PSTR("Abort\n"));
			return CMD_RET_SUCCESS;
		}
	}

	printf_P(PSTR("Total of %ld byte(s) (0x%lx) were the same\n"), ngood, ngood);
	return rcode;
}

command_ret_t do_mem_cp(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint32_t src, dest, count;
	int_fast8_t step;

	(void) cmdtp;
	(void) flag;

	if (argc != 4)
		return CMD_RET_USAGE;

	src = strtoul(argv[1], NULL, 16);
	src += base_address;
	dest = strtoul(argv[2], NULL, 16);
	dest += base_address;
	count = strtoul(argv[3], NULL, 16);

	if (count == 0) {
		my_puts_P(PSTR("Zero length?\n"));
		return CMD_RET_FAILURE;
	}

	if (dest > src) {
		src += count - 1;
		dest += count - 1;
		step = -1;
	} else
		step = 1;

	while (count-- > 0) {
		uint8_t data;
		if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
			my_puts_P(PSTR("Bus timeout\n"));
			return  CMD_RET_FAILURE;
		}
		data = z80_read(src);
		z80_write(dest, data);
		z80_bus_cmd(Release);
		src += step;
		dest += step;

		/* check for ctrl-c to abort... */
		if (ctrlc()) {
			my_puts_P(PSTR("Abort\n"));
			return CMD_RET_SUCCESS;
		}
	}
	return CMD_RET_SUCCESS;
}

command_ret_t do_mem_base(cmd_tbl_t *cmdtp, int flag, int argc,
		       char * const argv[])
{
	(void) cmdtp;
	(void) flag;

	if (argc > 1) {
		/* Set new base address. */
		base_address = strtoul(argv[1], NULL, 16);
	}
	/* Print the current base address. */
	printf_P(PSTR("Base Address: 0x%05lx\n"), base_address);
	return CMD_RET_SUCCESS;
}

command_ret_t do_mem_loop(cmd_tbl_t *cmdtp, int flag, int argc,
		       char * const argv[])
{
	uint32_t addr, length;

	(void) cmdtp;
	(void) flag;

	if (argc < 3)
		return CMD_RET_USAGE;

	/* Address is always specified. */
	addr = strtoul(argv[1], NULL, 16);

	/* Length is the number of bytes. */
	length = strtoul(argv[2], NULL, 16);


	/* We want to optimize the loops to run as fast as possible.
	 * If we have only one object, just run infinite loops.
	 */
	if (length == 1) {
		if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
			my_puts_P(PSTR("Bus timeout\n"));
			return  CMD_RET_FAILURE;
		}
		for (;;)
			z80_read(addr);
		z80_bus_cmd(Release);
	}

	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
		my_puts_P(PSTR("Bus timeout\n"));
		return  CMD_RET_FAILURE;
	}
	for (;;) {
		uint32_t i = length;
		uint32_t p = addr;
		while (i-- > 0)
			z80_read(p++);
	}
	z80_bus_cmd(Release);

	return CMD_RET_SUCCESS;
}

#ifdef CONFIG_LOOPW
command_ret_t do_mem_loopw (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
	uint32_t addr, length;
	uint8_t	data;

	(void) cmdtp;
	(void) flag;

	if (argc < 4)
		return CMD_RET_USAGE;

	/* Address is always specified. */
	addr = strtoul(argv[1], NULL, 16);

	/* Length is the number of bytes. */
	length = strtoul(argv[2], NULL, 16);

	data = strtoul(argv[3], NULL, 16);

	/* We want to optimize the loops to run as fast as possible.
	 * If we have only one object, just run infinite loops.
	 */
	if (length == 1) {
		if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
			my_puts_P(PSTR("Bus timeout\n"));
			return  CMD_RET_FAILURE;
		}
		for (;;)
			z80_write(addr, data);
	}

	if (!(z80_bus_cmd(Request) & ZST_ACQUIRED)) {
		my_puts_P(PSTR("Bus timeout\n"));
		return  CMD_RET_FAILURE;
	}
	for (;;) {
		uint32_t i = length;
		uint32_t p = addr;
		while (i-- > 0)
			z80_write(p++, data);
	}
}
#endif /* CONFIG_LOOPW */

#ifdef CONFIG_CMD_MEMTEST
static uint32_t mem_test_alt(vu_long *buf, uint32_t start_addr, uint32_t end_addr,
			  vu_long *dummy)
{
	vu_long *addr;
	uint32_t errs = 0;
	uint32_t val, readback;
	int j;
	vu_long offset;
	vu_long test_offset;
	vu_long pattern;
	vu_long temp;
	vu_long anti_pattern;
	vu_long num_words;
	static const FLASH uint32_t bitpattern[] = {
		0x00000001,	/* single bit */
		0x00000003,	/* two adjacent bits */
		0x00000007,	/* three adjacent bits */
		0x0000000F,	/* four adjacent bits */
		0x00000005,	/* two non-adjacent bits */
		0x00000015,	/* three non-adjacent bits */
		0x00000055,	/* four non-adjacent bits */
		0xaaaaaaaa,	/* alternating 1/0 */
	};

	num_words = (end_addr - start_addr) / sizeof(vu_long);

	/*
	 * Data line test: write a pattern to the first
	 * location, write the 1's complement to a 'parking'
	 * address (changes the state of the data bus so a
	 * floating bus doesn't give a false OK), and then
	 * read the value back. Note that we read it back
	 * into a variable because the next time we read it,
	 * it might be right (been there, tough to explain to
	 * the quality guys why it prints a failure when the
	 * "is" and "should be" are obviously the same in the
	 * error message).
	 *
	 * Rather than exhaustively testing, we test some
	 * patterns by shifting '1' bits through a field of
	 * '0's and '0' bits through a field of '1's (i.e.
	 * pattern and ~pattern).
	 */
	addr = buf;
	for (j = 0; j < sizeof(bitpattern) / sizeof(bitpattern[0]); j++) {
		val = bitpattern[j];
		for (; val != 0; val <<= 1) {
			*addr = val;
			*dummy  = ~val; /* clear the test data off the bus */
			readback = *addr;
			if (readback != val) {
				printf_P(PSTR("FAILURE (data line): "
					"expected %05lx, actual %05lx\n"),
						val, readback);
				errs++;
				if (ctrlc())
					return -1;
			}
			*addr  = ~val;
			*dummy  = val;
			readback = *addr;
			if (readback != ~val) {
				printf_P(PSTR("FAILURE (data line): "
					"Is %05lx, should be %05lx\n"),
						readback, ~val);
				errs++;
				if (ctrlc())
					return -1;
			}
		}
	}

	/*
	 * Based on code whose Original Author and Copyright
	 * information follows: Copyright (c) 1998 by Michael
	 * Barr. This software is placed into the public
	 * domain and may be used for any purpose. However,
	 * this notice must not be changed or removed and no
	 * warranty is either expressed or implied by its
	 * publication or distribution.
	 */

	/*
	* Address line test

	 * Description: Test the address bus wiring in a
	 *              memory region by performing a walking
	 *              1's test on the relevant bits of the
	 *              address and checking for aliasing.
	 *              This test will find single-bit
	 *              address failures such as stuck-high,
	 *              stuck-low, and shorted pins. The base
	 *              address and size of the region are
	 *              selected by the caller.

	 * Notes:	For best results, the selected base
	 *              address should have enough LSB 0's to
	 *              guarantee single address bit changes.
	 *              For example, to test a 64-Kbyte
	 *              region, select a base address on a
	 *              64-Kbyte boundary. Also, select the
	 *              region size as a power-of-two if at
	 *              all possible.
	 *
	 * Returns:     0 if the test succeeds, 1 if the test fails.
	 */
	pattern = (vu_long) 0xaaaaaaaa;
	anti_pattern = (vu_long) 0x55555555;

	debug("%s:%d: length = 0x%.5lx\n", __func__, __LINE__, num_words);
	/*
	 * Write the default pattern at each of the
	 * power-of-two offsets.
	 */
	for (offset = 1; offset < num_words; offset <<= 1)
		addr[offset] = pattern;

	/*
	 * Check for address bits stuck high.
	 */
	test_offset = 0;
	addr[test_offset] = anti_pattern;

	for (offset = 1; offset < num_words; offset <<= 1) {
		temp = addr[offset];
		if (temp != pattern) {
			printf_P(PSTR("\nFAILURE: Address bit stuck high @ 0x%.5lx:"
				" expected 0x%.5lx, actual 0x%.5lx\n"),
				start_addr + offset*sizeof(vu_long),
				pattern, temp);
			errs++;
			if (ctrlc())
				return -1;
		}
	}
	addr[test_offset] = pattern;

	/*
	 * Check for addr bits stuck low or shorted.
	 */
	for (test_offset = 1; test_offset < num_words; test_offset <<= 1) {
		addr[test_offset] = anti_pattern;

		for (offset = 1; offset < num_words; offset <<= 1) {
			temp = addr[offset];
			if ((temp != pattern) && (offset != test_offset)) {
				printf_P(PSTR("\nFAILURE: Address bit stuck low or"
					" shorted @ 0x%.5lx: expected 0x%.5lx,"
					" actual 0x%.5lx\n"),
					start_addr + offset*sizeof(vu_long),
					pattern, temp);
				errs++;
				if (ctrlc())
					return -1;
			}
		}
		addr[test_offset] = pattern;
	}

	/*
	 * Description: Test the integrity of a physical
	 *		memory device by performing an
	 *		increment/decrement test over the
	 *		entire region. In the process every
	 *		storage bit in the device is tested
	 *		as a zero and a one. The base address
	 *		and the size of the region are
	 *		selected by the caller.
	 *
	 * Returns:     0 if the test succeeds, 1 if the test fails.
	 */
	num_words++;

	/*
	 * Fill memory with a known pattern.
	 */
	for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
		addr[offset] = pattern;
	}

	/*
	 * Check each location and invert it for the second pass.
	 */
	for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
		temp = addr[offset];
		if (temp != pattern) {
			printf_P(PSTR("\nFAILURE (read/write) @ 0x%.5lx:"
				" expected 0x%.5lx, actual 0x%.5lx)\n"),
				start_addr + offset*sizeof(vu_long),
				pattern, temp);
			errs++;
			if (ctrlc())
				return -1;
		}

		anti_pattern = ~pattern;
		addr[offset] = anti_pattern;
	}

	/*
	 * Check each location for the inverted pattern and zero it.
	 */
	for (pattern = 1, offset = 0; offset < num_words; pattern++, offset++) {
		WATCHDOG_RESET();
		anti_pattern = ~pattern;
		temp = addr[offset];
		if (temp != anti_pattern) {
			printf_P(PSTR("\nFAILURE (read/write): @ 0x%.5lx:"
				" expected 0x%.5lx, actual 0x%.5lx)\n"),
				start_addr + offset*sizeof(vu_long),
				anti_pattern, temp);
			errs++;
			if (ctrlc())
				return -1;
		}
		addr[offset] = 0;
	}

	return 0;
}

static uint32_t mem_test_quick(vu_long *buf, uint32_t start_addr, uint32_t end_addr,
			    vu_long pattern, int iteration)
{
	vu_long *end;
	vu_long *addr;
	uint32_t errs = 0;
	uint32_t incr, length;
	uint32_t val, readback;

	/* Alternate the pattern */
	incr = 1;
	if (iteration & 1) {
		incr = -incr;
		/*
		 * Flip the pattern each time to make lots of zeros and
		 * then, the next time, lots of ones.  We decrement
		 * the "negative" patterns and increment the "positive"
		 * patterns to preserve this feature.
		 */
		if (pattern & 0x80000000)
			pattern = -pattern;	/* complement & increment */
		else
			pattern = ~pattern;
	}
	length = (end_addr - start_addr) / sizeof(uint32_t);
	end = buf + length;
	printf_P(PSTR("\rPattern %08lX  Writing..."
		"%12s"
		"\b\b\b\b\b\b\b\b\b\b"),
		pattern, "");

	for (addr = buf, val = pattern; addr < end; addr++) {
		*addr = val;
		val += incr;
	}

	my_puts_P(PSTR("Reading..."));

	for (addr = buf, val = pattern; addr < end; addr++) {
		readback = *addr;
		if (readback != val) {
			uint32_t offset = addr - buf;

			printf_P(PSTR("\nMem error @ 0x%08X: "
				"found %08lX, expected %08lX\n"),
				(unsigned int)(uintptr_t)(start_addr + offset*sizeof(vu_long)),
				readback, val);
			errs++;
			if (ctrlc())
				return -1;
		}
		val += incr;
	}

	return 0;
}

/*
 * Perform a memory test. A more complete alternative test can be
 * configured using CONFIG_SYS_ALT_MEMTEST. The complete test loops until
 * interrupted by ctrl-c or by a failure of one of the sub-tests.
 */
command_ret_t do_mem_mtest(cmd_tbl_t *cmdtp, int flag, int argc,
			char * const argv[])
{
	uint32_t start, end;
	vu_long *buf, *dummy;
	int iteration_limit;
/* TODO: command_ret_t */
	int ret;
	uint32_t errs = 0;	/* number of errors, or -1 if interrupted */
	uint32_t pattern;
	int iteration;
#if defined(CONFIG_SYS_ALT_MEMTEST)
	const int alt_test = 1;
#else
	const int alt_test = 0;
#endif

	if (argc > 1)
		start = strtoul(argv[1], NULL, 16);
	else
		start = CONFIG_SYS_MEMTEST_START;

	if (argc > 2)
		end = strtoul(argv[2], NULL, 16);
	else
		end = CONFIG_SYS_MEMTEST_END;

	if (argc > 3)
		pattern = (uint32_t)strtoul(argv[3], NULL, 16);
	else
		pattern = 0;

	if (argc > 4)
		iteration_limit = (uint32_t)strtoul(argv[4], NULL, 16);
	else
		iteration_limit = 0;

	printf_P(PSTR("Testing %08x ... %08x:\n"), (unsigned int)start, (unsigned int)end);
	debug("%s:%d: start %#05lx end %#05lx\n", __func__, __LINE__,
	      start, end);

/* TODO: */
//	buf = map_sysmem(start, end - start);
//	dummy = map_sysmem(CONFIG_SYS_MEMTEST_SCRATCH, sizeof(vu_long));
	for (iteration = 0;
			!iteration_limit || iteration < iteration_limit;
			iteration++) {
		if (ctrlc()) {
			errs = -1UL;
			break;
		}

		printf_P(PSTR("Iteration: %6d\r"), iteration + 1);
		debug("\n");
		if (alt_test) {
			errs = mem_test_alt(buf, start, end, dummy);
		} else {
			errs = mem_test_quick(buf, start, end, pattern,
					      iteration);
		}
		if (errs == -1UL)
			break;
	}

	if (errs == -1UL) {
		/* Memory test was aborted - write a newline to finish off */
		putc('\n');
		ret = 1;
	} else {
		printf_P(PSTR("Tested %d iteration(s) with %lu errors.\n"),
			iteration, errs);
		ret = errs != 0;
	}

	return ret;	/* not reached */
}
#endif	/* CONFIG_CMD_MEMTEST */