i386/x86_64 boot: setup data

Index: linux-2.6.23-rc8/include/asm-i386/bootparam.h
===================================================================
@@ -9,6 +9,17 @@
 #include <asm/ist.h>
 #include <video/edid.h>
 
+/* setup data types */
+#define SETUP_NONE			0
+
+/* extensible setup data list node */
+struct setup_data {
+	u64 next;
+	u32 type;
+	u32 len;
+	u8 data[0];
+} __attribute__((packed));
+
 struct setup_header {
 	u8	setup_sects;
 	u16	root_flags;

@@ -41,6 +52,10 @@
 	u32	initrd_addr_max;
 	u32	kernel_alignment;
 	u8	relocatable_kernel;
+	u8	_pad2[3];
+	u32	cmdline_size;
+	u32	_pad3;
+	u64	setup_data;
 } __attribute__((packed));
 
 struct sys_desc_table {

Index: linux-2.6.23-rc8/arch/x86_64/kernel/setup.c
===================================================================
@@ -250,6 +250,40 @@
 		ebda_size = 64*1024;
 }
 
+static void __init parse_setup_data(void)
+{
+	struct setup_data *data;
+	unsigned long pa_data;
+
+	if (boot_params.hdr.version < 0x0207)
+		return;
+	pa_data = boot_params.hdr.setup_data;
+	while (pa_data) {
+		data = early_ioremap(pa_data, PAGE_SIZE);
+		switch (data->type) {
+		default:
+			break;
+		}
+		pa_data = data->next;
+		early_iounmap(data, PAGE_SIZE);
+	}
+}
+
+static void __init reserve_setup_data(void)
+{
+	struct setup_data *data;
+	unsigned long pa_data;
+
+	if (boot_params.hdr.version < 0x0207)
+		return;
+	pa_data = boot_params.hdr.setup_data;
+	while (pa_data) {
+		data = __va(pa_data);
+		reserve_bootmem_generic(pa_data, sizeof(*data)+data->len);
+		pa_data = data->next;
+	}
+}
+
 void __init setup_arch(char **cmdline_p)
 {
 	printk(KERN_INFO "Command line: %s\n", boot_command_line);

@@ -285,6 +319,8 @@
 	strlcpy(command_line, boot_command_line, COMMAND_LINE_SIZE);
 	*cmdline_p = command_line;
 
+	parse_setup_data();
+
 	parse_early_param();
 
 	finish_e820_parsing();

@@ -373,6 +409,7 @@
         */
        acpi_reserve_bootmem();
 #endif
+	reserve_setup_data();
 	/*
 	 * Find and reserve possible boot-time SMP configuration:
 	 */

119 lines not on this page · raw message

Index: linux-2.6.23-rc8/include/asm-i386/io.h
===================================================================
@@ -126,6 +126,13 @@
 extern void iounmap(volatile void __iomem *addr);
 
 /*
+ * boot_ioremap is for temporary early boot-time mappings, before
+ * paging_init(), when the boot-time page tables are still in use.
+ * The mapping is currently limited to at most 4 pages.
+ */
+extern void *boot_ioremap(unsigned long offset, unsigned long size);
+
+/*
  * bt_ioremap() and bt_iounmap() are for temporary early boot-time
  * mappings, before the real ioremap() is functional.
  * A boot-time mapping is currently limited to at most 16 pages.