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 000000000000..618ac15a9e90
--- /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;
+}