Subject: Re: [PATCH 3/4] PowerPC 440EPx: Sequoia bootwrapper

From: Jerone Young <[email-masked]>
Date: Wed, 15 Aug 2007 12:37:45 -0500

What source tree patch based on? The latest kernel.org git tree does not
have arch/powerpc/boot/4xx.c or arch/powerpc/boot/4xx.h . This patch is
attempting to patch these files.

On Tue, 2007-08-14 at 22:53 +0400, Valentine Barshak wrote:
> Bootwrapper code for AMCC 440EPx Sequoia board.
> The DDR2 Denali controller support has been moved to
>  arch/powerpc/boot/4xx.c
> The code also uses 440EP clocking fixups
> initially provided for 440EP Bamboo.
> 
> Signed-off-by: Valentine Barshak <[email-masked]>
> ---
>  arch/powerpc/boot/44x.h            |    1 
>  arch/powerpc/boot/4xx.c            |  108 +++++++++++++++++++++++++++++++++++++
>  arch/powerpc/boot/4xx.h            |    1 
>  arch/powerpc/boot/Makefile         |    6 +-
>  arch/powerpc/boot/cuboot-sequoia.c |   31 ++++++++++
>  arch/powerpc/boot/sequoia.c        |   48 ++++++++++++++++
>  6 files changed, 193 insertions(+), 2 deletions(-)
> 
> diff -ruN linux-2.6.orig/arch/powerpc/boot/44x.h linux-2.6/arch/powerpc/boot/44x.h
> --- linux-2.6.orig/arch/powerpc/boot/44x.h	2007-08-14 17:11:16.000000000 +0400
> +++ linux-2.6/arch/powerpc/boot/44x.h	2007-08-14 17:25:37.000000000 +0400
> @@ -12,5 +12,6 @@
> 
>  void ebony_init(void *mac0, void *mac1);
>  void bamboo_init(void);
> +void sequoia_init(void *mac0, void *mac1);
> 
>  #endif /* _PPC_BOOT_44X_H_ */
> diff -ruN linux-2.6.orig/arch/powerpc/boot/4xx.c linux-2.6/arch/powerpc/boot/4xx.c
> --- linux-2.6.orig/arch/powerpc/boot/4xx.c	2007-08-14 17:11:16.000000000 +0400
> +++ linux-2.6/arch/powerpc/boot/4xx.c	2007-08-14 20:16:57.000000000 +0400
> @@ -39,6 +39,114 @@
>  	dt_fixup_memory(0, memsize);
>  }
> 
> +/* 4xx DDR1/2 Denali memory controller support */
> +/* DDR0 registers */
> +#define DDR0_02			2
> +#define DDR0_08			8
> +#define DDR0_10			10
> +#define DDR0_14			14
> +#define DDR0_42			42
> +#define DDR0_43			43
> +
> +/* DDR0_02 */
> +#define DDR_START		0x1
> +#define DDR_START_SHIFT		0
> +#define DDR_MAX_CS_REG		0x3
> +#define DDR_MAX_CS_REG_SHIFT	24
> +#define DDR_MAX_COL_REG		0xf
> +#define DDR_MAX_COL_REG_SHIFT	16
> +#define DDR_MAX_ROW_REG		0xf
> +#define DDR_MAX_ROW_REG_SHIFT	8
> +/* DDR0_08 */
> +#define DDR_DDR2_MODE		0x1
> +#define DDR_DDR2_MODE_SHIFT	0
> +/* DDR0_10 */
> +#define DDR_CS_MAP		0x3
> +#define DDR_CS_MAP_SHIFT	8
> +/* DDR0_14 */
> +#define DDR_REDUC		0x1
> +#define DDR_REDUC_SHIFT		16
> +/* DDR0_42 */
> +#define DDR_APIN		0x7
> +#define DDR_APIN_SHIFT		24
> +/* DDR0_43 */
> +#define DDR_COL_SZ		0x7
> +#define DDR_COL_SZ_SHIFT	8
> +#define DDR_BANK8		0x1
> +#define DDR_BANK8_SHIFT		0
> +
> +#define DDR_GET_VAL(val, mask, shift)	(((val) >> (shift)) & (mask))
> +
> +static inline u32 mfdcr_sdram0(u32 reg)
> +{
> +        mtdcr(DCRN_SDRAM0_CFGADDR, reg);
> +        return mfdcr(DCRN_SDRAM0_CFGDATA);
> +}
> +
> +void ibm4xx_denali_fixup_memsize(void)
> +{
> +	u32 val, max_cs, max_col, max_row;
> +	u32 cs, col, row, bank, dpath;
> +	unsigned long memsize;
> +
> +	val = mfdcr_sdram0(DDR0_02);
> +	if (!DDR_GET_VAL(val, DDR_START, DDR_START_SHIFT))
> +		fatal("DDR controller is not initialized\n");
> +
> +	/* get maximum cs col and row values */
> +	max_cs  = DDR_GET_VAL(val, DDR_MAX_CS_REG, DDR_MAX_CS_REG_SHIFT);
> +	max_col = DDR_GET_VAL(val, DDR_MAX_COL_REG, DDR_MAX_COL_REG_SHIFT);
> +	max_row = DDR_GET_VAL(val, DDR_MAX_ROW_REG, DDR_MAX_ROW_REG_SHIFT);
> +
> +	/* get CS value */
> +	val = mfdcr_sdram0(DDR0_10);
> +
> +	val = DDR_GET_VAL(val, DDR_CS_MAP, DDR_CS_MAP_SHIFT);
> +	cs = 0;
> +	while (val) {
> +		if (val && 0x1)
> +			cs++;
> +		val = val >> 1;
> +	}
> +
> +	if (!cs)
> +		fatal("No memory installed\n");
> +	if (cs > max_cs)
> +		fatal("DDR wrong CS configuration\n");
> +
> +	/* get data path bytes */
> +	val = mfdcr_sdram0(DDR0_14);
> +
> +	if (DDR_GET_VAL(val, DDR_REDUC, DDR_REDUC_SHIFT))
> +		dpath = 8; /* 64 bits */
> +	else
> +		dpath = 4; /* 32 bits */
> +
> +	/* get adress pins (rows) */
> +	val = mfdcr_sdram0(DDR0_42);
> +
> +	row = DDR_GET_VAL(val, DDR_APIN, DDR_APIN_SHIFT);
> +	if (row > max_row)
> +		fatal("DDR wrong APIN configuration\n");
> +	row = max_row - row;
> +
> +	/* get collomn size and banks */
> +	val = mfdcr_sdram0(DDR0_43);
> +
> +	col = DDR_GET_VAL(val, DDR_COL_SZ, DDR_COL_SZ_SHIFT);
> +	if (col > max_col)
> +		fatal("DDR wrong COL configuration\n");
> +	col = max_col - col;
> +
> +	if (DDR_GET_VAL(val, DDR_BANK8, DDR_BANK8_SHIFT))
> +		bank = 8; /* 8 banks */
> +	else
> +		bank = 4; /* 4 banks */
> +
> +	memsize = cs * (1 << (col+row)) * bank * dpath;
> +	dt_fixup_memory(0, memsize);
> +}
> +
>  #define DBCR0_RST_SYSTEM 0x30000000
> 
>  void ibm44x_dbcr_reset(void)
> diff -ruN linux-2.6.orig/arch/powerpc/boot/4xx.h linux-2.6/arch/powerpc/boot/4xx.h
> --- linux-2.6.orig/arch/powerpc/boot/4xx.h	2007-08-14 17:11:16.000000000 +0400
> +++ linux-2.6/arch/powerpc/boot/4xx.h	2007-08-14 20:24:22.000000000 +0400
> @@ -12,6 +12,7 @@
>  #define _POWERPC_BOOT_4XX_H_
> 
>  void ibm4xx_fixup_memsize(void);
> +void ibm4xx_denali_fixup_memsize(void);
>  void ibm44x_dbcr_reset(void);
>  void ibm40x_dbcr_reset(void);
>  void ibm4xx_quiesce_eth(u32 *emac0, u32 *emac1);
> diff -ruN linux-2.6.orig/arch/powerpc/boot/cuboot-sequoia.c linux-2.6/arch/powerpc/boot/cuboot-sequoia.c
> --- linux-2.6.orig/arch/powerpc/boot/cuboot-sequoia.c	1970-01-01 03:00:00.000000000 +0300
> +++ linux-2.6/arch/powerpc/boot/cuboot-sequoia.c	2007-08-14 17:25:37.000000000 +0400
> @@ -0,0 +1,31 @@
> +/*
> + * Old U-boot compatibility for Sequoia
> + *
> + * Based on Ebony code by David Gibson <[email-masked]>
> + *
> + * Copyright 2007 David Gibson, IBM Corporatio.
> + *   Based on cuboot-83xx.c, which is:
> + * Copyright (c) 2007 Freescale Semiconductor, Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of the GNU General Public License version 2 as published
> + * by the Free Software Foundation.
> + */
> +
> +#include "ops.h"
> +#include "stdio.h"
> +#include "44x.h"
> +#include "cuboot.h"
> +
> +#define TARGET_4xx
> +#define TARGET_44x
> +#include "ppcboot.h"
> +
> +static bd_t bd;
> +
> +void platform_init(unsigned long r3, unsigned long r4, unsigned long r5,
> +                   unsigned long r6, unsigned long r7)
> +{
> +	CUBOOT_INIT();
> +	sequoia_init(&bd.bi_enetaddr, &bd.bi_enet1addr);
> +}
> diff -ruN linux-2.6.orig/arch/powerpc/boot/Makefile linux-2.6/arch/powerpc/boot/Makefile
> --- linux-2.6.orig/arch/powerpc/boot/Makefile	2007-08-14 17:11:16.000000000 +0400
> +++ linux-2.6/arch/powerpc/boot/Makefile	2007-08-14 17:25:38.000000000 +0400
> @@ -44,10 +44,11 @@
>  src-wlib := string.S crt0.S stdio.c main.c flatdevtree.c flatdevtree_misc.c \
>  		ns16550.c serial.c simple_alloc.c div64.S util.S \
>  		gunzip_util.c elf_util.c $(zlib) devtree.c oflib.c ofconsole.c \
> -		4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c
> +		4xx.c ebony.c mv64x60.c mpsc.c mv64x60_i2c.c cuboot.c bamboo.c \
> +		sequoia.c
>  src-plat := of.c cuboot-83xx.c cuboot-85xx.c holly.c \
>  		cuboot-ebony.c treeboot-ebony.c prpmc2800.c \
> -		ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c
> +		ps3-head.S ps3-hvcall.S ps3.c treeboot-bamboo.c cuboot-sequoia.c
>  src-boot := $(src-wlib) $(src-plat) empty.c
> 
>  src-boot := $(addprefix $(obj)/, $(src-boot))
> @@ -143,6 +144,7 @@
>  image-$(CONFIG_PPC_85xx)		+= cuImage.85xx
>  image-$(CONFIG_EBONY)			+= treeImage.ebony cuImage.ebony
>  image-$(CONFIG_BAMBOO)			+= treeImage.bamboo
> +image-$(CONFIG_SEQUOIA)			+= cuImage.sequoia
>  endif
> 
>  # For 32-bit powermacs, build the COFF and miboot images
> diff -ruN linux-2.6.orig/arch/powerpc/boot/sequoia.c linux-2.6/arch/powerpc/boot/sequoia.c
> --- linux-2.6.orig/arch/powerpc/boot/sequoia.c	1970-01-01 03:00:00.000000000 +0300
> +++ linux-2.6/arch/powerpc/boot/sequoia.c	2007-08-14 20:52:10.000000000 +0400
> @@ -0,0 +1,48 @@
> +/*
> + * Valentine Barshak <[email-masked]>
> + * Copyright 2007 MontaVista Software, Inc
> + *
> + * Based on Bamboo code by Josh Boyer <[email-masked]>
> + * Copyright IBM Corporation, 2007
> + *
> + * 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
> + */
> +#include <stdarg.h>
> +#include <stddef.h>
> +#include "types.h"
> +#include "elf.h"
> +#include "string.h"
> +#include "stdio.h"
> +#include "page.h"
> +#include "ops.h"
> +#include "dcr.h"
> +#include "4xx.h"
> +#include "44x.h"
> +
> +extern char _dtb_start[];
> +extern char _dtb_end[];
> +
> +static u8 *sequoia_mac0, *sequoia_mac1;
> +
> +
> +static void sequoia_fixups(void)
> +{
> +	unsigned long sysclk = 33333333;
> +
> +	ibm440ep_fixup_clocks(sysclk, 11059200);
> +	ibm4xx_fixup_ebc_ranges("/plb/opb/ebc");
> +	ibm4xx_denali_fixup_memsize();
> +	dt_fixup_mac_addresses(sequoia_mac0, sequoia_mac1);
> +}
> +
> +void sequoia_init(void *mac0, void *mac1)
> +{
> +	platform_ops.fixups = sequoia_fixups;
> +	platform_ops.exit = ibm44x_dbcr_reset;
> +	sequoia_mac0 = mac0;
> +	sequoia_mac1 = mac1;
> +	ft_init(_dtb_start, 0, 32);
> +	serial_console_init();
> +}
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