Merge with /home/stefan/git/u-boot/denx

1 files changed, 157 insertions, 0 deletions

diff --git a/board/amcc/sequoia/init.S b/board/amcc/sequoia/init.S
new file mode 100644
index 0000000..3d4ac85
--- /dev/null
+++ b/board/amcc/sequoia/init.S
@@ -0,0 +1,157 @@
+/*
+ *
+ * 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 <ppc_asm.tmpl>
+#include <config.h>
+
+/* General */
+#define TLB_VALID   0x00000200
+#define _256M       0x10000000
+
+/* Supported page sizes */
+
+#define SZ_1K	    0x00000000
+#define SZ_4K	    0x00000010
+#define SZ_16K	    0x00000020
+#define SZ_64K	    0x00000030
+#define SZ_256K	    0x00000040
+#define SZ_1M	    0x00000050
+#define SZ_8M       0x00000060
+#define SZ_16M	    0x00000070
+#define SZ_256M	    0x00000090
+
+/* Storage attributes */
+#define SA_W	    0x00000800	    /* Write-through */
+#define SA_I	    0x00000400	    /* Caching inhibited */
+#define SA_M	    0x00000200	    /* Memory coherence */
+#define SA_G	    0x00000100	    /* Guarded */
+#define SA_E	    0x00000080	    /* Endian */
+
+/* Access control */
+#define AC_X	    0x00000024	    /* Execute */
+#define AC_W	    0x00000012	    /* Write */
+#define AC_R	    0x00000009	    /* Read */
+
+/* Some handy macros */
+
+#define EPN(e)		((e) & 0xfffffc00)
+#define TLB0(epn,sz)	( (EPN((epn)) | (sz) | TLB_VALID ) )
+#define TLB1(rpn,erpn)	( ((rpn)&0xfffffc00) | (erpn) )
+#define TLB2(a)		( (a)&0x00000fbf )
+
+#define tlbtab_start\
+	mflr    r1  ;\
+	bl 0f	    ;
+
+#define tlbtab_end\
+	.long 0, 0, 0	;   \
+0:	mflr    r0	;   \
+	mtlr    r1	;   \
+	blr		;
+
+#define tlbentry(epn,sz,rpn,erpn,attr)\
+	.long TLB0(epn,sz),TLB1(rpn,erpn),TLB2(attr)
+
+
+/**************************************************************************
+ * TLB TABLE
+ *
+ * This table is used by the cpu boot code to setup the initial tlb
+ * entries. Rather than make broad assumptions in the cpu source tree,
+ * this table lets each board set things up however they like.
+ *
+ *  Pointer to the table is returned in r1
+ *
+ *************************************************************************/
+    .section .bootpg,"ax"
+    .globl tlbtab
+
+tlbtab:
+	tlbtab_start
+
+	/*
+	 * BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the
+	 * speed up boot process. It is patched after relocation to enable SA_I
+	*/
+#ifndef CONFIG_NAND_SPL
+	tlbentry( CFG_BOOT_BASE_ADDR, SZ_256M, CFG_BOOT_BASE_ADDR, 1, AC_R|AC_W|AC_X|SA_G )
+#else
+	tlbentry( CFG_NAND_BOOT_SPL_SRC, SZ_4K, CFG_NAND_BOOT_SPL_SRC, 1, AC_R|AC_W|AC_X|SA_G )
+#endif
+
+	/* TLB-entry for DDR SDRAM (Up to 2GB) */
+	tlbentry( CFG_SDRAM_BASE, SZ_256M, CFG_SDRAM_BASE, 0, AC_R|AC_W|AC_X|SA_G|SA_I )
+
+#ifdef CFG_INIT_RAM_DCACHE
+	/* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
+	tlbentry( CFG_INIT_RAM_ADDR, SZ_64K, CFG_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G )
+#endif
+
+	/* TLB-entry for PCI Memory */
+	tlbentry( CFG_PCI_MEMBASE, SZ_256M, CFG_PCI_MEMBASE, 1, AC_R|AC_W|SA_G|SA_I )
+	tlbentry( CFG_PCI_MEMBASE1, SZ_256M, CFG_PCI_MEMBASE1, 1, AC_R|AC_W|SA_G|SA_I )
+	tlbentry( CFG_PCI_MEMBASE2, SZ_256M, CFG_PCI_MEMBASE2, 1, AC_R|AC_W|SA_G|SA_I )
+	tlbentry( CFG_PCI_MEMBASE3, SZ_256M, CFG_PCI_MEMBASE3, 1, AC_R|AC_W|SA_G|SA_I )
+
+	/* TLB-entry for EBC */
+	tlbentry( CFG_BCSR_BASE, SZ_1K, CFG_BCSR_BASE, 1, AC_R|AC_W|AC_X|SA_G|SA_I )
+
+	/* TLB-entry for NAND */
+	tlbentry( CFG_NAND_ADDR, SZ_1K, CFG_NAND_ADDR, 1, AC_R|AC_W|AC_X|SA_G|SA_I )
+
+	/* TLB-entry for Internal Registers & OCM */
+	tlbentry( 0xe0000000, SZ_16M, 0xe0000000, 0,  AC_R|AC_W|AC_X|SA_I )
+
+	/*TLB-entry PCI registers*/
+	tlbentry( 0xEEC00000, SZ_1K, 0xEEC00000, 1,  AC_R|AC_W|AC_X|SA_G|SA_I )
+
+	/* TLB-entry for peripherals */
+	tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I)
+
+	tlbtab_end
+
+#if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL)
+	/*
+	 * For NAND booting the first TLB has to be reconfigured to full size
+	 * and with caching disabled after running from RAM!
+	 */
+#define TLB00	TLB0(CFG_BOOT_BASE_ADDR, SZ_256M)
+#define TLB01	TLB1(CFG_BOOT_BASE_ADDR, 1)
+#define TLB02	TLB2(AC_R|AC_W|AC_X|SA_G|SA_I)
+
+	.globl	reconfig_tlb0
+reconfig_tlb0:
+	sync
+	isync
+	addi	r4,r0,0x0000		/* TLB entry #0 */
+	lis	r5,TLB00@h
+	ori	r5,r5,TLB00@l
+	tlbwe	r5,r4,0x0000		/* Save it out */
+	lis	r5,TLB01@h
+	ori	r5,r5,TLB01@l
+	tlbwe	r5,r4,0x0001		/* Save it out */
+	lis	r5,TLB02@h
+	ori	r5,r5,TLB02@l
+	tlbwe	r5,r4,0x0002		/* Save it out */
+	sync
+	isync
+	blr
+#endif