[PATCH 14/16] powerpc: add ps3 platform OS params support

Geoff Levand geoffrey.levand at am.sony.com
Sat Nov 11 07:03:44 EST 2006


Add support to access the parameter data from the ps3pf other OS area of flash
memory.  The parameter data mainly holds user preferences like static ip
address, etc.

Signed-off-by: Geoff Levand <geoffrey.levand at am.sony.com>

---
 arch/powerpc/platforms/ps3pf/Makefile  |    2 
 arch/powerpc/platforms/ps3pf/os-area.c |  245 +++++++++++++++++++++++++++++++++
 arch/powerpc/platforms/ps3pf/setup.c   |    1 
 3 files changed, 247 insertions(+), 1 deletion(-)

Index: cell--common--6/arch/powerpc/platforms/ps3pf/Makefile
===================================================================
--- cell--common--6.orig/arch/powerpc/platforms/ps3pf/Makefile
+++ cell--common--6/arch/powerpc/platforms/ps3pf/Makefile
@@ -1,2 +1,2 @@
 obj-$(CONFIG_PS3PF) += setup.o mm.o smp.o time.o hvcall.o htab.o repository.o
-obj-$(CONFIG_PS3PF) += interrupt.o exports.o
+obj-$(CONFIG_PS3PF) += interrupt.o exports.o os-area.o
Index: cell--common--6/arch/powerpc/platforms/ps3pf/os-area.c
===================================================================
--- /dev/null
+++ cell--common--6/arch/powerpc/platforms/ps3pf/os-area.c
@@ -0,0 +1,245 @@
+/*
+ * os-area.c - PS3 Platform OS data area.
+ *
+ *  Copyright (C) 2006 Sony Computer Entertainment Inc.
+ *  Copyright 2006 Sony Corp.
+ *
+ *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/io.h>
+
+#include <asm/lmb.h>
+#include <asm/ps3pf.h>
+
+#include "platform.h"
+
+enum {
+	segment_size = 0x200,
+	ldr_format_raw = 0,
+	ldr_format_gzip = 1,
+	boot_flag_game_os = 0,
+	boot_flag_other_os = 1,
+	av_multi_out_ntsc = 0,
+	av_multi_out_pal_rgb = 1,
+	av_multi_out_pal_ycbcr = 2,
+	av_multi_out_secam = 3,
+	ctrl_button_o_is_yes = 0,
+	ctrl_button_x_is_yes = 1,
+};
+
+/**
+ * struct header - os area header segment.
+ * @magic_num: Always 'cell_ext_os_area'.
+ * @hdr_version: Header format version number.
+ * @os_region_offset: Segment number of os region.
+ * @bootloader_offset: Segment number of bootloader image.
+ * @ldr_format: ldr_format flag.
+ * @ldr_size: Size of bootloader image in bytes.
+ */
+
+struct header {
+	s8 magic_num[16];
+	u32 hdr_version;
+	u32 os_image_offset;
+	u32 bootloader_offset;
+	u32 _reserved_1;
+	u32 ldr_format;
+	u32 ldr_size;
+	u32 _reserved_2[6];
+} __attribute__ ((packed));
+
+/**
+ * struct params - os area params segment.
+ * @boot_flag: User preference of operating system.
+ * @num_params: Number of params in this (params) segment.
+ * @rtc_diff: Difference in seconds between 1970 and the ps3pf rtc value.
+ * @av_multi_out: User preference of AV output.
+ * @ctrl_button: User preference of controller button config.
+ * @static_ip_addr: User preference of static IP address.
+ * @network_mask: User preference of static network mask.
+ * @default_gateway: User preference of static default gateway.
+ * @dns_primary: User preference of static primary dns server.
+ * @dns_secondary: User preference of static secondary dns server.
+ *
+ * User preference of zero for static_ip_addr means use dhcp.
+ */
+
+struct params {
+	u32 boot_flag;
+	u32 _reserved_1[3];
+	u32 num_params;
+	u32 _reserved_2[3];
+	/* param 0 */
+	s64 rtc_diff;
+	u8 av_multi_out;
+	u8 ctrl_button;
+	u8 _reserved_3[6];
+	/* param 1 */
+	u8 static_ip_addr[4];
+	u8 network_mask[4];
+	u8 default_gateway[4];
+	u8 _reserved_4[4];
+	/* param 2 */
+	u8 dns_primary[4];
+	u8 dns_secondary[4];
+	u8 _reserved_5[8];
+} __attribute__ ((packed));
+
+/**
+ * struct os_params - Static working copies of data from the os area.
+ *
+ * For the convinience of the guest, the HV makes a copy of the os area in
+ * flash to a high address in the boot memory region and then puts that RAM
+ * address and the byte count into the repository for retreval by the guest.
+ * We copy the data we want into a static variable and allow the memory setup
+ * by the HV to be claimed by the lmb manager.
+ */
+
+struct os_params {
+	/* param 0 */
+	s64 rtc_diff;
+	unsigned int av_multi_out;
+	unsigned int ctrl_button;
+	/* param 1 */
+	u8 static_ip_addr[4];
+	u8 network_mask[4];
+	u8 default_gateway[4];
+	/* param 2 */
+	u8 dns_primary[4];
+	u8 dns_secondary[4];
+} static os_params;
+
+#define dump_header(_a) _dump_header(_a, __func__, __LINE__)
+static void _dump_header(const struct header __iomem *h, const char* func,
+	int line)
+{
+	pr_debug("%s:%d: h.magic_num:         '%s'\n", func, line,
+		h->magic_num);
+	pr_debug("%s:%d: h.hdr_version:       %u\n", func, line,
+		h->hdr_version);
+	pr_debug("%s:%d: h.os_image_offset:   %u\n", func, line,
+		h->os_image_offset);
+	pr_debug("%s:%d: h.bootloader_offset: %u\n", func, line,
+		h->bootloader_offset);
+	pr_debug("%s:%d: h.ldr_format:        %u\n", func, line,
+		h->ldr_format);
+	pr_debug("%s:%d: h.ldr_size:          %xh\n", func, line,
+		h->ldr_size);
+}
+
+#define dump_params(_a) _dump_params(_a, __func__, __LINE__)
+static void _dump_params(const struct params __iomem *p, const char* func,
+	int line)
+{
+	pr_debug("%s:%d: p.boot_flag:       %u\n", func, line, p->boot_flag);
+	pr_debug("%s:%d: p.num_params:      %u\n", func, line, p->num_params);
+	pr_debug("%s:%d: p.rtc_diff         %ld\n", func, line, p->rtc_diff);
+	pr_debug("%s:%d: p.av_multi_out     %u\n", func, line, p->av_multi_out);
+	pr_debug("%s:%d: p.ctrl_button:     %u\n", func, line, p->ctrl_button);
+	pr_debug("%s:%d: p.static_ip_addr:  %u.%u.%u.%u\n", func, line,
+		p->static_ip_addr[0], p->static_ip_addr[1],
+		p->static_ip_addr[2], p->static_ip_addr[3]);
+	pr_debug("%s:%d: p.network_mask:    %u.%u.%u.%u\n", func, line,
+		p->network_mask[0], p->network_mask[1],
+		p->network_mask[2], p->network_mask[3]);
+	pr_debug("%s:%d: p.default_gateway: %u.%u.%u.%u\n", func, line,
+		p->default_gateway[0], p->default_gateway[1],
+		p->default_gateway[2], p->default_gateway[3]);
+	pr_debug("%s:%d: p.dns_primary:     %u.%u.%u.%u\n", func, line,
+		p->dns_primary[0], p->dns_primary[1],
+		p->dns_primary[2], p->dns_primary[3]);
+	pr_debug("%s:%d: p.dns_secondary:   %u.%u.%u.%u\n", func, line,
+		p->dns_secondary[0], p->dns_secondary[1],
+		p->dns_secondary[2], p->dns_secondary[3]);
+}
+
+static int __init verify_header(const struct header *header)
+{
+	if (memcmp(header->magic_num, "cell_ext_os_area", 16)) {
+		pr_debug("%s:%d magic_num failed\n", __func__, __LINE__);
+		return -1;
+	}
+
+	if (header->hdr_version != 1) {
+		pr_debug("%s:%d hdr_version failed\n", __func__, __LINE__);
+		return -1;
+	}
+
+	if (header->os_image_offset > header->bootloader_offset) {
+		pr_debug("%s:%d offsets failed\n", __func__, __LINE__);
+		return -1;
+	}
+
+	return 0;
+}
+
+int __init ps3pf_os_area_init(void)
+{
+	int result;
+	u64 lpar_addr;
+	unsigned int size;
+	struct header *header;
+	struct params *params;
+
+	result = ps3pf_repository_read_boot_dat_info(&lpar_addr, &size);
+
+	if (result) {
+		pr_debug("%s:%d ps3pf_repository_read_boot_dat_info failed\n",
+			__func__, __LINE__);
+		return result;
+	}
+
+	header = (struct header *)__va(lpar_addr);
+	params = (struct params *)__va(lpar_addr + segment_size);
+
+	result = verify_header(header);
+
+	if (result) {
+		pr_debug("%s:%d verify_header failed\n", __func__, __LINE__);
+		dump_header(header);
+		return -EIO;
+	}
+
+	dump_header(header);
+	dump_params(params);
+
+	os_params.rtc_diff = params->rtc_diff;
+	os_params.av_multi_out = params->av_multi_out;
+	if (0) { /* currently not used */
+		os_params.ctrl_button = params->ctrl_button;
+		memcpy(os_params.static_ip_addr, params->static_ip_addr, 4);
+		memcpy(os_params.network_mask, params->network_mask, 4);
+		memcpy(os_params.default_gateway, params->default_gateway, 4);
+		memcpy(os_params.dns_secondary, params->dns_secondary, 4);
+	}
+
+	return result;
+}
+
+/**
+ * ps3pf_os_area_rtc_diff - Returns the ps3pf rtc diff value.
+ *
+ * The ps3pf rtc maintains a value that approximates seconds since
+ * 2000-01-01 00:00:00 UTC.  Returns the exact number of seconds from 1970 to
+ * 2000 when os_params.rtc_diff has not been properly set up.
+ */
+
+u64 ps3pf_os_area_rtc_diff(void)
+{
+	return os_params.rtc_diff ? os_params.rtc_diff : 946684800UL;
+}
Index: cell--common--6/arch/powerpc/platforms/ps3pf/setup.c
===================================================================
--- cell--common--6.orig/arch/powerpc/platforms/ps3pf/setup.c
+++ cell--common--6/arch/powerpc/platforms/ps3pf/setup.c
@@ -115,6 +115,7 @@
 
 	powerpc_firmware_features |= FW_FEATURE_LPAR;
 
+	ps3pf_os_area_init();
 	ps3pf_mm_init();
 	ps3pf_mm_vas_create(&htab_size);
 	ps3pf_hpte_init(htab_size);



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