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authorPaul Burton <paul.burton@imgtec.com>2014-06-14 00:00:10 +0100
committerPatrick Georgi <pgeorgi@google.com>2015-03-21 16:56:59 +0100
commite8530033b8b5a353c884fd3c90457f703ff0bc38 (patch)
tree401cdb669ee76cae632dfdee644c21ccb8a618f5 /src/arch/mips/bootblock.inc
parentcb8f36043c9f0aec980c340108fc92011aacc9ca (diff)
arch/mips: Add base MIPS architecture support
Add the build infrastructure and basic architectural support required to build for targets using the MIPS architecture. This is sufficient to run on a simulator, but will require the addition of some cache maintenance and timer setup in order to run on real hardware. BUG=chrome-os-partner:31438, chromium:409082 TEST=none yet Change-Id: I027902d8408e419b626d0aab7768bc564bd49047 Signed-off-by: Patrick Georgi <pgeorgi@chromium.org> Original-Commit-Id: fcc0d934d7223922c878b1f87021cb5c2d7e6f21 Original-Change-Id: If4f99554463bd3760fc142477440326fd16c67cc Original-Signed-off-by: Paul Burton <paul.burton@imgtec.com> Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org> Original-Reviewed-on: https://chromium-review.googlesource.com/207972 Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org> Reviewed-on: http://review.coreboot.org/8760 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Diffstat (limited to 'src/arch/mips/bootblock.inc')
-rw-r--r--src/arch/mips/bootblock.inc44
1 files changed, 44 insertions, 0 deletions
diff --git a/src/arch/mips/bootblock.inc b/src/arch/mips/bootblock.inc
new file mode 100644
index 0000000000..90cb386bf1
--- /dev/null
+++ b/src/arch/mips/bootblock.inc
@@ -0,0 +1,44 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Imagination Technologies
+ *
+ * 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; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+.set noreorder /* Prevent assembler from "optimizing" this code. */
+
+.section ".start", "ax", %progbits
+.globl _start
+_start:
+ /* Set the stack pointer */
+ li $sp, CONFIG_STACK_TOP
+
+ /*
+ * Initialise the stack to a known value, used later to check for
+ * overflow.
+ */
+ li $t0, CONFIG_STACK_BOTTOM
+ addi $t1, $sp, -4
+ li $t2, 0xdeadbeef
+1: sw $t2, 0($t0)
+ bne $t0, $t1, 1b
+ addi $t0, $t0, 4
+
+ /* Run main */
+ b main
+
+ /* Should never return from main. */
+2:
+ b 2b