Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 795 insertions, 0 deletions

diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c
new file mode 100644
index 00000000000..618ac15a9e9
--- /dev/null
+++ b/drivers/pnp/pnpbios/rsparser.c
@@ -0,0 +1,795 @@
+/*
+ * rsparser.c - parses and encodes pnpbios resource data streams
+ *
+ */
+
+#include <linux/config.h>
+#include <linux/ctype.h>
+#include <linux/pnp.h>
+#include <linux/pnpbios.h>
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#else
+inline void pcibios_penalize_isa_irq(int irq) {}
+#endif /* CONFIG_PCI */
+
+#include "pnpbios.h"
+
+/* standard resource tags */
+#define SMALL_TAG_PNPVERNO		0x01
+#define SMALL_TAG_LOGDEVID		0x02
+#define SMALL_TAG_COMPATDEVID		0x03
+#define SMALL_TAG_IRQ			0x04
+#define SMALL_TAG_DMA			0x05
+#define SMALL_TAG_STARTDEP		0x06
+#define SMALL_TAG_ENDDEP		0x07
+#define SMALL_TAG_PORT			0x08
+#define SMALL_TAG_FIXEDPORT		0x09
+#define SMALL_TAG_VENDOR		0x0e
+#define SMALL_TAG_END			0x0f
+#define LARGE_TAG			0x80
+#define LARGE_TAG_MEM			0x81
+#define LARGE_TAG_ANSISTR		0x82
+#define LARGE_TAG_UNICODESTR		0x83
+#define LARGE_TAG_VENDOR		0x84
+#define LARGE_TAG_MEM32			0x85
+#define LARGE_TAG_FIXEDMEM32		0x86
+
+/*
+ * Resource Data Stream Format:
+ *
+ * Allocated Resources (required)
+ * end tag ->
+ * Resource Configuration Options (optional)
+ * end tag ->
+ * Compitable Device IDs (optional)
+ * final end tag ->
+ */
+
+/*
+ * Allocated Resources
+ */
+
+static void
+pnpbios_parse_allocated_irqresource(struct pnp_resource_table * res, int irq)
+{
+	int i = 0;
+	while (!(res->irq_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_IRQ) i++;
+	if (i < PNP_MAX_IRQ) {
+		res->irq_resource[i].flags = IORESOURCE_IRQ;  // Also clears _UNSET flag
+		if (irq == -1) {
+			res->irq_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->irq_resource[i].start =
+		res->irq_resource[i].end = (unsigned long) irq;
+		pcibios_penalize_isa_irq(irq);
+	}
+}
+
+static void
+pnpbios_parse_allocated_dmaresource(struct pnp_resource_table * res, int dma)
+{
+	int i = 0;
+	while (!(res->dma_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_DMA) i++;
+	if (i < PNP_MAX_DMA) {
+		res->dma_resource[i].flags = IORESOURCE_DMA;  // Also clears _UNSET flag
+		if (dma == -1) {
+			res->dma_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->dma_resource[i].start =
+		res->dma_resource[i].end = (unsigned long) dma;
+	}
+}
+
+static void
+pnpbios_parse_allocated_ioresource(struct pnp_resource_table * res, int io, int len)
+{
+	int i = 0;
+	while (!(res->port_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_PORT) i++;
+	if (i < PNP_MAX_PORT) {
+		res->port_resource[i].flags = IORESOURCE_IO;  // Also clears _UNSET flag
+		if (len <= 0 || (io + len -1) >= 0x10003) {
+			res->port_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->port_resource[i].start = (unsigned long) io;
+		res->port_resource[i].end = (unsigned long)(io + len - 1);
+	}
+}
+
+static void
+pnpbios_parse_allocated_memresource(struct pnp_resource_table * res, int mem, int len)
+{
+	int i = 0;
+	while (!(res->mem_resource[i].flags & IORESOURCE_UNSET) && i < PNP_MAX_MEM) i++;
+	if (i < PNP_MAX_MEM) {
+		res->mem_resource[i].flags = IORESOURCE_MEM;  // Also clears _UNSET flag
+		if (len <= 0) {
+			res->mem_resource[i].flags |= IORESOURCE_DISABLED;
+			return;
+		}
+		res->mem_resource[i].start = (unsigned long) mem;
+		res->mem_resource[i].end = (unsigned long)(mem + len - 1);
+	}
+}
+
+static unsigned char *
+pnpbios_parse_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+{
+	unsigned int len, tag;
+	int io, size, mask, i;
+
+	if (!p)
+		return NULL;
+
+	/* Blank the resource table values */
+	pnp_init_resource_table(res);
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) { /* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else { /* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0]>>3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_MEM:
+			if (len != 9)
+				goto len_err;
+			io = *(short *) &p[4];
+			size = *(short *) &p[10];
+			pnpbios_parse_allocated_memresource(res, io, size);
+			break;
+
+		case LARGE_TAG_ANSISTR:
+			/* ignore this for now */
+			break;
+
+		case LARGE_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			io = *(int *) &p[4];
+			size = *(int *) &p[16];
+			pnpbios_parse_allocated_memresource(res, io, size);
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			io = *(int *) &p[4];
+			size = *(int *) &p[8];
+			pnpbios_parse_allocated_memresource(res, io, size);
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			io = -1;
+			mask= p[1] + p[2]*256;
+			for (i=0;i<16;i++, mask=mask>>1)
+				if(mask & 0x01) io=i;
+			pnpbios_parse_allocated_irqresource(res, io);
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			io = -1;
+			mask = p[1];
+			for (i=0;i<8;i++, mask = mask>>1)
+				if(mask & 0x01) io=i;
+			pnpbios_parse_allocated_dmaresource(res, io);
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			io = p[2] + p[3] *256;
+			size = p[7];
+			pnpbios_parse_allocated_ioresource(res, io, size);
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			io = p[1] + p[2] * 256;
+			size = p[3];
+			pnpbios_parse_allocated_ioresource(res, io, size);
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Resource Configuration Options
+ */
+
+static void
+pnpbios_parse_mem_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_mem * mem;
+	mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL);
+	if (!mem)
+		return;
+	mem->min = ((p[5] << 8) | p[4]) << 8;
+	mem->max = ((p[7] << 8) | p[6]) << 8;
+	mem->align = (p[9] << 8) | p[8];
+	mem->size = ((p[11] << 8) | p[10]) << 8;
+	mem->flags = p[3];
+	pnp_register_mem_resource(option,mem);
+	return;
+}
+
+static void
+pnpbios_parse_mem32_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_mem * mem;
+	mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL);
+	if (!mem)
+		return;
+	mem->min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+	mem->max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+	mem->align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
+	mem->size = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
+	mem->flags = p[3];
+	pnp_register_mem_resource(option,mem);
+	return;
+}
+
+static void
+pnpbios_parse_fixed_mem32_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_mem * mem;
+	mem = pnpbios_kmalloc(sizeof(struct pnp_mem), GFP_KERNEL);
+	if (!mem)
+		return;
+	mem->min = mem->max = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+	mem->size = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+	mem->align = 0;
+	mem->flags = p[3];
+	pnp_register_mem_resource(option,mem);
+	return;
+}
+
+static void
+pnpbios_parse_irq_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_irq * irq;
+	unsigned long bits;
+
+	irq = pnpbios_kmalloc(sizeof(struct pnp_irq), GFP_KERNEL);
+	if (!irq)
+		return;
+	bits = (p[2] << 8) | p[1];
+	bitmap_copy(irq->map, &bits, 16);
+	if (size > 2)
+		irq->flags = p[3];
+	else
+		irq->flags = IORESOURCE_IRQ_HIGHEDGE;
+	pnp_register_irq_resource(option,irq);
+	return;
+}
+
+static void
+pnpbios_parse_dma_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_dma * dma;
+	dma = pnpbios_kmalloc(sizeof(struct pnp_dma), GFP_KERNEL);
+	if (!dma)
+		return;
+	dma->map = p[1];
+	dma->flags = p[2];
+	pnp_register_dma_resource(option,dma);
+	return;
+}
+
+static void
+pnpbios_parse_port_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_port * port;
+	port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL);
+	if (!port)
+		return;
+	port->min = (p[3] << 8) | p[2];
+	port->max = (p[5] << 8) | p[4];
+	port->align = p[6];
+	port->size = p[7];
+	port->flags = p[1] ? PNP_PORT_FLAG_16BITADDR : 0;
+	pnp_register_port_resource(option,port);
+	return;
+}
+
+static void
+pnpbios_parse_fixed_port_option(unsigned char *p, int size, struct pnp_option *option)
+{
+	struct pnp_port * port;
+	port = pnpbios_kmalloc(sizeof(struct pnp_port), GFP_KERNEL);
+	if (!port)
+		return;
+	port->min = port->max = (p[2] << 8) | p[1];
+	port->size = p[3];
+	port->align = 0;
+	port->flags = PNP_PORT_FLAG_FIXED;
+	pnp_register_port_resource(option,port);
+	return;
+}
+
+static unsigned char *
+pnpbios_parse_resource_option_data(unsigned char * p, unsigned char * end, struct pnp_dev *dev)
+{
+	unsigned int len, tag;
+	int priority = 0;
+	struct pnp_option *option, *option_independent;
+
+	if (!p)
+		return NULL;
+
+	option_independent = option = pnp_register_independent_option(dev);
+	if (!option)
+		return NULL;
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) { /* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else { /* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0]>>3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_MEM:
+			if (len != 9)
+				goto len_err;
+			pnpbios_parse_mem_option(p, len, option);
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			pnpbios_parse_mem32_option(p, len, option);
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			pnpbios_parse_fixed_mem32_option(p, len, option);
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			pnpbios_parse_irq_option(p, len, option);
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			pnpbios_parse_dma_option(p, len, option);
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			pnpbios_parse_port_option(p, len, option);
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			pnpbios_parse_fixed_port_option(p, len, option);
+			break;
+
+		case SMALL_TAG_STARTDEP:
+			if (len > 1)
+				goto len_err;
+			priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
+			if (len > 0)
+				priority = 0x100 | p[1];
+			option = pnp_register_dependent_option(dev, priority);
+			if (!option)
+				return NULL;
+			break;
+
+		case SMALL_TAG_ENDDEP:
+			if (len != 0)
+				goto len_err;
+			if (option_independent == option)
+				printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_STARTDEP tag\n");
+			option = option_independent;
+			break;
+
+		case SMALL_TAG_END:
+			if (option_independent != option)
+				printk(KERN_WARNING "PnPBIOS: Missing SMALL_TAG_ENDDEP tag\n");
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Compatible Device IDs
+ */
+
+#define HEX(id,a) hex[((id)>>a) & 15]
+#define CHAR(id,a) (0x40 + (((id)>>a) & 31))
+//
+
+void pnpid32_to_pnpid(u32 id, char *str)
+{
+	const char *hex = "0123456789abcdef";
+
+	id = be32_to_cpu(id);
+	str[0] = CHAR(id, 26);
+	str[1] = CHAR(id, 21);
+	str[2] = CHAR(id,16);
+	str[3] = HEX(id, 12);
+	str[4] = HEX(id, 8);
+	str[5] = HEX(id, 4);
+	str[6] = HEX(id, 0);
+	str[7] = '\0';
+
+	return;
+}
+//
+#undef CHAR
+#undef HEX
+
+static unsigned char *
+pnpbios_parse_compatible_ids(unsigned char *p, unsigned char *end, struct pnp_dev *dev)
+{
+	int len, tag;
+	char id[8];
+	struct pnp_id *dev_id;
+
+	if (!p)
+		return NULL;
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) { /* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else { /* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0]>>3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_ANSISTR:
+			strncpy(dev->name, p + 3, len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
+			dev->name[len >= PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
+			break;
+
+		case SMALL_TAG_COMPATDEVID: /* compatible ID */
+			if (len != 4)
+				goto len_err;
+			dev_id =  pnpbios_kmalloc(sizeof (struct pnp_id), GFP_KERNEL);
+			if (!dev_id)
+				return NULL;
+			memset(dev_id, 0, sizeof(struct pnp_id));
+			pnpid32_to_pnpid(p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24,id);
+			memcpy(&dev_id->id, id, 7);
+			pnp_add_id(dev_id, dev);
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Allocated Resource Encoding
+ */
+
+static void pnpbios_encode_mem(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[4] = (base >> 8) & 0xff;
+	p[5] = ((base >> 8) >> 8) & 0xff;
+	p[6] = (base >> 8) & 0xff;
+	p[7] = ((base >> 8) >> 8) & 0xff;
+	p[10] = (len >> 8) & 0xff;
+	p[11] = ((len >> 8) >> 8) & 0xff;
+	return;
+}
+
+static void pnpbios_encode_mem32(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[6] = (base >> 16) & 0xff;
+	p[7] = (base >> 24) & 0xff;
+	p[8] = base & 0xff;
+	p[9] = (base >> 8) & 0xff;
+	p[10] = (base >> 16) & 0xff;
+	p[11] = (base >> 24) & 0xff;
+	p[16] = len & 0xff;
+	p[17] = (len >> 8) & 0xff;
+	p[18] = (len >> 16) & 0xff;
+	p[19] = (len >> 24) & 0xff;
+	return;
+}
+
+static void pnpbios_encode_fixed_mem32(unsigned char *p, struct resource * res)
+{	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[6] = (base >> 16) & 0xff;
+	p[7] = (base >> 24) & 0xff;
+	p[8] = len & 0xff;
+	p[9] = (len >> 8) & 0xff;
+	p[10] = (len >> 16) & 0xff;
+	p[11] = (len >> 24) & 0xff;
+	return;
+}
+
+static void pnpbios_encode_irq(unsigned char *p, struct resource * res)
+{
+	unsigned long map = 0;
+	map = 1 << res->start;
+	p[1] = map & 0xff;
+	p[2] = (map >> 8) & 0xff;
+	return;
+}
+
+static void pnpbios_encode_dma(unsigned char *p, struct resource * res)
+{
+	unsigned long map = 0;
+	map = 1 << res->start;
+	p[1] = map & 0xff;
+	return;
+}
+
+static void pnpbios_encode_port(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[2] = base & 0xff;
+	p[3] = (base >> 8) & 0xff;
+	p[4] = base & 0xff;
+	p[5] = (base >> 8) & 0xff;
+	p[7] = len & 0xff;
+	return;
+}
+
+static void pnpbios_encode_fixed_port(unsigned char *p, struct resource * res)
+{
+	unsigned long base = res->start;
+	unsigned long len = res->end - res->start + 1;
+	p[1] = base & 0xff;
+	p[2] = (base >> 8) & 0xff;
+	p[3] = len & 0xff;
+	return;
+}
+
+static unsigned char *
+pnpbios_encode_allocated_resource_data(unsigned char * p, unsigned char * end, struct pnp_resource_table * res)
+{
+	unsigned int len, tag;
+	int port = 0, irq = 0, dma = 0, mem = 0;
+
+	if (!p)
+		return NULL;
+
+	while ((char *)p < (char *)end) {
+
+		/* determine the type of tag */
+		if (p[0] & LARGE_TAG) { /* large tag */
+			len = (p[2] << 8) | p[1];
+			tag = p[0];
+		} else { /* small tag */
+			len = p[0] & 0x07;
+			tag = ((p[0]>>3) & 0x0f);
+		}
+
+		switch (tag) {
+
+		case LARGE_TAG_MEM:
+			if (len != 9)
+				goto len_err;
+			pnpbios_encode_mem(p, &res->mem_resource[mem]);
+			mem++;
+			break;
+
+		case LARGE_TAG_MEM32:
+			if (len != 17)
+				goto len_err;
+			pnpbios_encode_mem32(p, &res->mem_resource[mem]);
+			mem++;
+			break;
+
+		case LARGE_TAG_FIXEDMEM32:
+			if (len != 9)
+				goto len_err;
+			pnpbios_encode_fixed_mem32(p, &res->mem_resource[mem]);
+			mem++;
+			break;
+
+		case SMALL_TAG_IRQ:
+			if (len < 2 || len > 3)
+				goto len_err;
+			pnpbios_encode_irq(p, &res->irq_resource[irq]);
+			irq++;
+			break;
+
+		case SMALL_TAG_DMA:
+			if (len != 2)
+				goto len_err;
+			pnpbios_encode_dma(p, &res->dma_resource[dma]);
+			dma++;
+			break;
+
+		case SMALL_TAG_PORT:
+			if (len != 7)
+				goto len_err;
+			pnpbios_encode_port(p, &res->port_resource[port]);
+			port++;
+			break;
+
+		case SMALL_TAG_VENDOR:
+			/* do nothing */
+			break;
+
+		case SMALL_TAG_FIXEDPORT:
+			if (len != 3)
+				goto len_err;
+			pnpbios_encode_fixed_port(p, &res->port_resource[port]);
+			port++;
+			break;
+
+		case SMALL_TAG_END:
+			p = p + 2;
+        		return (unsigned char *)p;
+			break;
+
+		default: /* an unkown tag */
+			len_err:
+			printk(KERN_ERR "PnPBIOS: Unknown tag '0x%x', length '%d'.\n", tag, len);
+			break;
+		}
+
+		/* continue to the next tag */
+		if (p[0] & LARGE_TAG)
+			p += len + 3;
+		else
+			p += len + 1;
+	}
+
+	printk(KERN_ERR "PnPBIOS: Resource structure does not contain an end tag.\n");
+
+	return NULL;
+}
+
+
+/*
+ * Core Parsing Functions
+ */
+
+int
+pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node)
+{
+	unsigned char * p = (char *)node->data;
+	unsigned char * end = (char *)(node->data + node->size);
+	p = pnpbios_parse_allocated_resource_data(p,end,&dev->res);
+	if (!p)
+		return -EIO;
+	p = pnpbios_parse_resource_option_data(p,end,dev);
+	if (!p)
+		return -EIO;
+	p = pnpbios_parse_compatible_ids(p,end,dev);
+	if (!p)
+		return -EIO;
+	return 0;
+}
+
+int
+pnpbios_read_resources_from_node(struct pnp_resource_table *res,
+				 struct pnp_bios_node * node)
+{
+	unsigned char * p = (char *)node->data;
+	unsigned char * end = (char *)(node->data + node->size);
+	p = pnpbios_parse_allocated_resource_data(p,end,res);
+	if (!p)
+		return -EIO;
+	return 0;
+}
+
+int
+pnpbios_write_resources_to_node(struct pnp_resource_table *res,
+				struct pnp_bios_node * node)
+{
+	unsigned char * p = (char *)node->data;
+	unsigned char * end = (char *)(node->data + node->size);
+	p = pnpbios_encode_allocated_resource_data(p,end,res);
+	if (!p)
+		return -EIO;
+	return 0;
+}