[people/ms/u-boot.git] / board / pcs440ep / init.S

/*
 * (C) Copyright 2006
 * Stefan Roese, DENX Software Engineering, sr@denx.de.
 *
 * 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

/* 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
	 */
	tlbentry( CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M, CONFIG_SYS_BOOT_BASE_ADDR, 0, AC_R|AC_W|AC_X|SA_G/*|SA_I*/)

	/* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
	tlbentry( CONFIG_SYS_INIT_RAM_ADDR, SZ_64K, CONFIG_SYS_INIT_RAM_ADDR, 0, AC_R|AC_W|AC_X|SA_G )

	/*
	 * TLB entries for SDRAM are not needed on this platform.
	 * They are dynamically generated in the SPD DDR detection
	 * routine.
	 */

	tlbentry( CONFIG_SYS_PCI_BASE, SZ_256M, CONFIG_SYS_PCI_BASE, 0, AC_R|AC_W|SA_G|SA_I )

	/* PCI */
	tlbentry( CONFIG_SYS_PCI_MEMBASE, SZ_256M, CONFIG_SYS_PCI_MEMBASE, 0, AC_R|AC_W|SA_G|SA_I )
	tlbentry( CONFIG_SYS_PCI_MEMBASE1, SZ_256M, CONFIG_SYS_PCI_MEMBASE1, 0, AC_R|AC_W|SA_G|SA_I )
	tlbentry( CONFIG_SYS_PCI_MEMBASE2, SZ_256M, CONFIG_SYS_PCI_MEMBASE2, 0, AC_R|AC_W|SA_G|SA_I )
	tlbentry( CONFIG_SYS_PCI_MEMBASE3, SZ_256M, CONFIG_SYS_PCI_MEMBASE3, 0, AC_R|AC_W|SA_G|SA_I )

	/* USB 2.0 Device */
	tlbentry( CONFIG_SYS_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_R|AC_W|SA_G|SA_I )

	tlbtab_end
Commit	Line	Data
a4c8d138 SR	1	/*
	2	* (C) Copyright 2006
	3	* Stefan Roese, DENX Software Engineering, sr@denx.de.
	4	*
	5	* See file CREDITS for list of people who contributed to this
	6	* project.
	7	*
	8	* This program is free software; you can redistribute it and/or
	9	* modify it under the terms of the GNU General Public License as
	10	* published by the Free Software Foundation; either version 2 of
	11	* the License, or (at your option) any later version.
	12	*
	13	* This program is distributed in the hope that it will be useful,
	14	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	15	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	16	* GNU General Public License for more details.
	17	*
	18	* You should have received a copy of the GNU General Public License
	19	* along with this program; if not, write to the Free Software
	20	* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
	21	* MA 02111-1307 USA
	22	*/
	23
	24	#include <ppc_asm.tmpl>
	25	#include <config.h>
	26
	27	/* General */
	28	#define TLB_VALID 0x00000200
	29
	30	/* Supported page sizes */
	31
	32	#define SZ_1K 0x00000000
	33	#define SZ_4K 0x00000010
	34	#define SZ_16K 0x00000020
	35	#define SZ_64K 0x00000030
	36	#define SZ_256K 0x00000040
	37	#define SZ_1M 0x00000050
	38	#define SZ_8M 0x00000060
	39	#define SZ_16M 0x00000070
	40	#define SZ_256M 0x00000090
	41
	42	/* Storage attributes */
	43	#define SA_W 0x00000800 /* Write-through */
	44	#define SA_I 0x00000400 /* Caching inhibited */
	45	#define SA_M 0x00000200 /* Memory coherence */
	46	#define SA_G 0x00000100 /* Guarded */
	47	#define SA_E 0x00000080 /* Endian */
	48
	49	/* Access control */
	50	#define AC_X 0x00000024 /* Execute */
	51	#define AC_W 0x00000012 /* Write */
	52	#define AC_R 0x00000009 /* Read */
	53
	54	/* Some handy macros */
	55
	56	#define EPN(e) ((e) & 0xfffffc00)
	57	#define TLB0(epn,sz) ( (EPN((epn)) \| (sz) \| TLB_VALID ) )
	58	#define TLB1(rpn,erpn) ( ((rpn)&0xfffffc00) \| (erpn) )
	59	#define TLB2(a) ( (a)&0x00000fbf )
	60
	61	#define tlbtab_start\
	62	mflr r1 ;\
	63	bl 0f ;
	64
65	#define tlbtab_end\
66	.long 0, 0, 0 ; \
67	0: mflr r0 ; \
68	mtlr r1 ; \
69	blr ;
70
71	#define tlbentry(epn,sz,rpn,erpn,attr)\
72	.long TLB0(epn,sz),TLB1(rpn,erpn),TLB2(attr)
73
74
75	/**************************************************************************
76	* TLB TABLE
77	*
78	* This table is used by the cpu boot code to setup the initial tlb
79	* entries. Rather than make broad assumptions in the cpu source tree,
80	* this table lets each board set things up however they like.
81	*
82	* Pointer to the table is returned in r1
83	*
84	*************************************************************************/
85
86	.section .bootpg,"ax"
87	.globl tlbtab
88
89	tlbtab:
566a494f	90	tlbtab_start
a4c8d138	91
566a494f HS	92	/*
	93	* BOOT_CS (FLASH) must be first. Before relocation SA_I can be off to use the
	94	* speed up boot process. It is patched after relocation to enable SA_I
	95	*/
6d0f6bcf	96	tlbentry( CONFIG_SYS_BOOT_BASE_ADDR, SZ_256M, CONFIG_SYS_BOOT_BASE_ADDR, 0, AC_R\|AC_W\|AC_X\|SA_G/\|SA_I/)
a4c8d138	97
566a494f	98	/* TLB-entry for init-ram in dcache (SA_I must be turned off!) */
6d0f6bcf	99	tlbentry( CONFIG_SYS_INIT_RAM_ADDR, SZ_64K, CONFIG_SYS_INIT_RAM_ADDR, 0, AC_R\|AC_W\|AC_X\|SA_G )
a4c8d138	100
566a494f HS	101	/*
	102	* TLB entries for SDRAM are not needed on this platform.
	103	* They are dynamically generated in the SPD DDR detection
	104	* routine.
	105	*/
a4c8d138	106
6d0f6bcf	107	tlbentry( CONFIG_SYS_PCI_BASE, SZ_256M, CONFIG_SYS_PCI_BASE, 0, AC_R\|AC_W\|SA_G\|SA_I )
a4c8d138	108
566a494f	109	/* PCI */
6d0f6bcf JCPV	110	tlbentry( CONFIG_SYS_PCI_MEMBASE, SZ_256M, CONFIG_SYS_PCI_MEMBASE, 0, AC_R\|AC_W\|SA_G\|SA_I )
	111	tlbentry( CONFIG_SYS_PCI_MEMBASE1, SZ_256M, CONFIG_SYS_PCI_MEMBASE1, 0, AC_R\|AC_W\|SA_G\|SA_I )
	112	tlbentry( CONFIG_SYS_PCI_MEMBASE2, SZ_256M, CONFIG_SYS_PCI_MEMBASE2, 0, AC_R\|AC_W\|SA_G\|SA_I )
	113	tlbentry( CONFIG_SYS_PCI_MEMBASE3, SZ_256M, CONFIG_SYS_PCI_MEMBASE3, 0, AC_R\|AC_W\|SA_G\|SA_I )
a4c8d138	114
566a494f	115	/* USB 2.0 Device */
6d0f6bcf	116	tlbentry( CONFIG_SYS_USB_DEVICE, SZ_1K, 0x50000000, 0, AC_R\|AC_W\|SA_G\|SA_I )
566a494f HS	117
566a494f HS	118	tlbtab_end