diff options
Diffstat (limited to 'src/soc/nvidia/tegra124/cpug.S')
| -rw-r--r-- | src/soc/nvidia/tegra124/cpug.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/src/soc/nvidia/tegra124/cpug.S b/src/soc/nvidia/tegra124/cpug.S new file mode 100644 index 0000000000..7f761e8de4 --- /dev/null +++ b/src/soc/nvidia/tegra124/cpug.S @@ -0,0 +1,56 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2013 Google Inc. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + + .align 6 + .arm + + .global cpug_stack_pointer +cpug_stack_pointer: + .word 0 + + .global cpug_entry_point +cpug_entry_point: + .word 0 + + .global cpug_setup + .type cpug_setup, function + cpug_setup: + + /* + * Set the cpu to System mode with IRQ and FIQ disabled. Prefetch/Data + * aborts may happen early and crash before the abort handlers are + * installed, but at least the problem will show up near the code that + * causes it. + */ + msr cpsr_cxf, #0xdf + + ldr sp, cpug_stack_pointer + eor lr, lr + ldr r0, cpug_entry_point + bx r0 |