From 03e8649bc699053ccdbbd4a3c2eaf05241e22a5b Mon Sep 17 00:00:00 2001 From: David Claffey Date: Wed, 16 Dec 2009 11:23:52 +0000 Subject: MIPS: merge mips fast_data patch from David N. Claffey Signed-off-by: Spencer Oliver --- src/target/mips_ejtag.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) (limited to 'src/target/mips_ejtag.c') diff --git a/src/target/mips_ejtag.c b/src/target/mips_ejtag.c index 68a39faf..6f7baf01 100644 --- a/src/target/mips_ejtag.c +++ b/src/target/mips_ejtag.c @@ -4,6 +4,8 @@ * * * Copyright (C) 2008 by David T.L. Wong * * * + * Copyright (C) 2009 by David N. Claffey * + * * * This program is free software; you can redistribute it and/or modify * * it under the terms of the GNU General Public License as published by * * the Free Software Foundation; either version 2 of the License, or * @@ -286,3 +288,42 @@ int mips_ejtag_init(struct mips_ejtag *ejtag_info) return ERROR_OK; } + +int mips_ejtag_fastdata_scan(struct mips_ejtag *ejtag_info, int write, uint32_t *data) +{ + struct jtag_tap *tap; + tap = ejtag_info->tap; + + if (tap == NULL) + return ERROR_FAIL; + + struct scan_field fields[2]; + uint8_t spracc = 0; + uint8_t t[4] = {0, 0, 0, 0}; + + /* fastdata 1-bit register */ + fields[0].tap = tap; + fields[0].num_bits = 1; + fields[0].out_value = &spracc; + fields[0].in_value = NULL; + + /* processor access data register 32 bit */ + fields[1].tap = tap; + fields[1].num_bits = 32; + fields[1].out_value = t; + + if (write) + { + fields[1].in_value = NULL; + buf_set_u32(t, 0, 32, *data); + } + else + { + fields[1].in_value = (uint8_t *) data; + } + + jtag_add_dr_scan(2, fields, jtag_get_end_state()); + keep_alive(); + + return ERROR_OK; +} -- cgit v1.2.3