powerpc: change 86xx SMP boot method
We put the bootpg for the secondary cpus into memory and use
BPTR to get to it. This is a step towards converting to the
ePAPR boot methodology. Also, the code is written to
deal properly with more than 4GB of RAM.
Signed-off-by: Becky Bruce <becky.bruce@freescale.com>
diff --git a/cpu/mpc86xx/release.S b/cpu/mpc86xx/release.S
new file mode 100644
index 0000000..b524e50
--- /dev/null
+++ b/cpu/mpc86xx/release.S
@@ -0,0 +1,169 @@
+/*
+ * Copyright 2004, 2007, 2008 Freescale Semiconductor.
+ * Srikanth Srinivasan <srikanth.srinivaan@freescale.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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 (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+#include <config.h>
+#include <mpc86xx.h>
+#include <version.h>
+
+#include <ppc_asm.tmpl>
+#include <ppc_defs.h>
+
+#include <asm/cache.h>
+#include <asm/mmu.h>
+
+/* If this is a multi-cpu system then we need to handle the
+ * 2nd cpu. The assumption is that the 2nd cpu is being
+ * held in boot holdoff mode until the 1st cpu unlocks it
+ * from Linux. We'll do some basic cpu init and then pass
+ * it to the Linux Reset Vector.
+ * Sri: Much of this initialization is not required. Linux
+ * rewrites the bats, and the sprs and also enables the L1 cache.
+ *
+ * Core 0 must copy this to a 1M aligned region and set BPTR
+ * to point to it.
+ */
+#if (CONFIG_NUM_CPUS > 1)
+ .align 12
+.globl __secondary_start_page
+__secondary_start_page:
+ .space 0x100 /* space over to reset vector loc */
+ mfspr r0, MSSCR0
+ andi. r0, r0, 0x0020
+ rlwinm r0,r0,27,31,31
+ mtspr PIR, r0
+
+ /* Invalidate BATs */
+ li r0, 0
+ mtspr IBAT0U, r0
+ mtspr IBAT1U, r0
+ mtspr IBAT2U, r0
+ mtspr IBAT3U, r0
+ mtspr IBAT4U, r0
+ mtspr IBAT5U, r0
+ mtspr IBAT6U, r0
+ mtspr IBAT7U, r0
+ isync
+ mtspr DBAT0U, r0
+ mtspr DBAT1U, r0
+ mtspr DBAT2U, r0
+ mtspr DBAT3U, r0
+ mtspr DBAT4U, r0
+ mtspr DBAT5U, r0
+ mtspr DBAT6U, r0
+ mtspr DBAT7U, r0
+ isync
+ sync
+
+ /* enable extended addressing */
+ mfspr r0, HID0
+ lis r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@h
+ ori r0, r0, (HID0_HIGH_BAT_EN | HID0_XBSEN | HID0_XAEN)@l
+ mtspr HID0, r0
+ sync
+ isync
+
+#ifdef CONFIG_SYS_L2
+ /* init the L2 cache */
+ addis r3, r0, L2_INIT@h
+ ori r3, r3, L2_INIT@l
+ sync
+ mtspr l2cr, r3
+#ifdef CONFIG_ALTIVEC
+ dssall
+#endif
+ /* invalidate the L2 cache */
+ mfspr r3, l2cr
+ rlwinm. r3, r3, 0, 0, 0
+ beq 1f
+
+ mfspr r3, l2cr
+ rlwinm r3, r3, 0, 1, 31
+
+#ifdef CONFIG_ALTIVEC
+ dssall
+#endif
+ sync
+ mtspr l2cr, r3
+ sync
+1: mfspr r3, l2cr
+ oris r3, r3, L2CR_L2I@h
+ mtspr l2cr, r3
+
+invl2:
+ mfspr r3, l2cr
+ andis. r3, r3, L2CR_L2I@h
+ bne invl2
+ sync
+#endif
+
+ /* enable and invalidate the data cache */
+ mfspr r3, HID0
+ li r5, HID0_DCFI|HID0_DLOCK
+ andc r3, r3, r5
+ mtspr HID0, r3 /* no invalidate, unlock */
+ ori r3, r3, HID0_DCE
+ ori r5, r3, HID0_DCFI
+ mtspr HID0, r5 /* enable + invalidate */
+ mtspr HID0, r3 /* enable */
+ sync
+#ifdef CFG_L2
+ sync
+ lis r3, L2_ENABLE@h
+ ori r3, r3, L2_ENABLE@l
+ mtspr l2cr, r3
+ isync
+ sync
+#endif
+
+ /* enable and invalidate the instruction cache*/
+ mfspr r3, HID0
+ li r5, HID0_ICFI|HID0_ILOCK
+ andc r3, r3, r5
+ ori r3, r3, HID0_ICE
+ ori r5, r3, HID0_ICFI
+ mtspr HID0, r5
+ mtspr HID0, r3
+ isync
+ sync
+
+ /* TBEN in HID0 */
+ mfspr r4, HID0
+ oris r4, r4, 0x0400
+ mtspr HID0, r4
+ sync
+ isync
+
+ /* MCP|SYNCBE|ABE in HID1 */
+ mfspr r4, HID1
+ oris r4, r4, 0x8000
+ ori r4, r4, 0x0C00
+ mtspr HID1, r4
+ sync
+ isync
+
+ lis r3, CONFIG_LINUX_RESET_VEC@h
+ ori r3, r3, CONFIG_LINUX_RESET_VEC@l
+ mtlr r3
+ blr
+
+ /* Never Returns, Running in Linux Now */
+#endif
