- Major update of the dynamic device tree so it can handle
* subtractive resources
* merging with the static device tree
* more device types than just pci
- The piece to watch out for is the new enable_resources method that was needed in all of the drivers
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1096 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/include/device/chip.h b/src/include/device/chip.h
index d1132a1..a98625a 100644
--- a/src/include/device/chip.h
+++ b/src/include/device/chip.h
@@ -1,3 +1,7 @@
+#ifndef DEVICE_CHIP_H
+
+#include <device/path.h>
+
/* chips are arbitrary chips (superio, southbridge, etc.)
* They have private structures that define chip resources and default
* settings. They have four externally visible functions for control.
@@ -48,23 +52,38 @@
/* there is one of these for each TYPE of chip */
struct chip_control {
- void (*enable)(struct chip *, enum chip_pass);
- char *path; /* the default path. Can be overridden
- * by commands in config
- */
- // This is the print name for debugging
- char *name;
+ /* This is the print name for debugging */
+ char *name;
+ void (*enable)(struct chip *, enum chip_pass);
+ void (*enumerate)(struct chip *chip);
};
+
+struct chip_device_path {
+ struct device_path path;
+ unsigned channel;
+ int enable;
+};
+
+struct device;
+struct bus;
+
+#ifndef MAX_CHIP_PATHS
+#define MAX_CHIP_PATHS 16
+#endif
struct chip {
- struct chip_control *control; /* for this device */
- char *path; /* can be 0, in which case the default is taken */
- char *configuration; /* can be 0. */
- int irq;
- struct chip *next, *children;
- /* there is one of these for each INSTANCE of a chip */
- void *chip_info; /* the dreaded "void *" */
+ struct chip_control *control; /* for this device */
+ struct chip_device_path path[MAX_CHIP_PATHS]; /* can be 0, in which case the default is taken */
+ char *configuration; /* can be 0. */
+ struct chip *next, *children;
+ /* there is one of these for each INSTANCE of a chip */
+ void *chip_info; /* the dreaded "void *" */
+ /* bus and device links into the device tree */
+ struct bus *bus;
+ struct device *dev;
};
extern struct chip static_root;
extern void chip_configure(struct chip *, enum chip_pass);
+extern void chip_enumerate(struct chip *chip);
+#endif /* DEVICE_CHIP_H */
diff --git a/src/include/device/device.h b/src/include/device/device.h
index 21e5dfc..5529abc 100644
--- a/src/include/device/device.h
+++ b/src/include/device/device.h
@@ -3,6 +3,7 @@
#include <stdint.h>
#include <device/resource.h>
+#include <device/path.h>
struct device;
typedef struct device * device_t;
@@ -10,33 +11,42 @@
struct device_operations {
void (*read_resources)(device_t dev);
void (*set_resources)(device_t dev);
+ void (*enable_resources)(device_t dev);
void (*init)(device_t dev);
unsigned int (*scan_bus)(device_t bus, unsigned int max);
void (*enable)(device_t dev);
};
+struct bus {
+ device_t dev; /* This bridge device */
+ device_t children; /* devices behind this bridge */
+ unsigned bridge_ctrl; /* Bridge control register */
+ unsigned char link; /* The index of this link */
+ unsigned char secondary; /* secondary bus number */
+ unsigned char subordinate; /* max subordinate bus number */
+ unsigned char cap; /* PCi capability offset */
+};
+
#define MAX_RESOURCES 6
+#define MAX_LINKS 3
/*
* There is one device structure for each slot-number/function-number
* combination:
*/
struct device {
- device_t bus; /* bus this device is on */
- device_t children; /* devices behind this bridge */
- device_t sibling; /* next device on this bus */
- device_t next; /* chain of all devices */
+ struct bus * bus; /* bus this device is on */
+ device_t sibling; /* next device on this bus */
+ device_t next; /* chain of all devices */
- unsigned int devfn; /* encoded device & function index */
+ struct device_path path;
unsigned short vendor;
unsigned short device;
unsigned int class; /* 3 bytes: (base,sub,prog-if) */
unsigned int hdr_type; /* PCI header type */
unsigned int enable : 1; /* set if we should enable the device */
- unsigned char secondary; /* secondary bus number */
- unsigned char subordinate; /* max subordinate bus number */
uint8_t command;
/*
* In theory, the irq level can be read from configuration
@@ -56,6 +66,10 @@
*/
struct resource resource[MAX_RESOURCES];
unsigned int resources;
+
+ struct bus link[MAX_LINKS];
+ unsigned int links;
+
unsigned long rom_address;
struct device_operations *ops;
};
@@ -65,19 +79,22 @@
/* Generic device interface functions */
+extern device_t alloc_dev(struct bus *parent, struct device_path *path);
extern void dev_enumerate(void);
extern void dev_configure(void);
extern void dev_enable(void);
extern void dev_initialize(void);
/* Generic device helper functions */
-void append_device(device_t dev);
-void compute_allocate_resource(device_t bus, struct resource *bridge,
+extern void compute_allocate_resource(struct bus *bus, struct resource *bridge,
unsigned long type_mask, unsigned long type);
-void assign_resources(device_t bus);
-void enumerate_static_device(void);
+extern void assign_resources(struct bus *bus);
+extern void enable_resources(struct device *dev);
+extern void enumerate_static_device(void);
+extern const char *dev_path(device_t dev);
/* Helper functions */
+device_t alloc_find_dev(struct bus *bus, struct device_path *path);
device_t dev_find_device (unsigned int vendor, unsigned int device, device_t from);
device_t dev_find_class (unsigned int class, device_t from);
device_t dev_find_slot (unsigned int bus, unsigned int devfn);
@@ -88,5 +105,10 @@
#define DEVICE_IO_ALIGN 16
#define DEVICE_MEM_ALIGN 4096
+struct device_operations default_dev_ops_root;
+extern void root_dev_read_resources(device_t dev);
+extern void root_dev_set_resources(device_t dev);
+extern unsigned int walk_static_devices(device_t bus, unsigned int max);
+extern void enable_childrens_resources(device_t dev);
#endif /* DEVICE_H */
diff --git a/src/include/device/path.h b/src/include/device/path.h
new file mode 100644
index 0000000..cf89a68
--- /dev/null
+++ b/src/include/device/path.h
@@ -0,0 +1,41 @@
+#ifndef DEVICE_PATH_H
+#define DEVICE_PATH_H
+
+enum device_path_type {
+ DEVICE_PATH_NONE = 0,
+ DEVICE_PATH_PCI,
+ DEVICE_PATH_PNP,
+ DEVICE_PATH_I2C,
+};
+
+struct pci_path
+{
+ unsigned devfn;
+};
+
+struct pnp_path
+{
+ unsigned port;
+ unsigned device;
+};
+
+struct i2c_path
+{
+ unsigned device;
+};
+
+struct device_path {
+ enum device_path_type type;
+ union {
+ struct pci_path pci;
+ struct pnp_path pnp;
+ struct i2c_path i2c;
+ } u;
+};
+
+
+#define DEVICE_PATH_MAX 30
+
+extern int path_eq(struct device_path *path1, struct device_path *path2);
+
+#endif /* DEVICE_PATH_H */
diff --git a/src/include/device/pci.h b/src/include/device/pci.h
index 0b76de3..aa6778c 100644
--- a/src/include/device/pci.h
+++ b/src/include/device/pci.h
@@ -34,13 +34,15 @@
struct device_operations default_pci_ops_dev;
struct device_operations default_pci_ops_bus;
-struct device_operations default_pci_ops_root;
-void pci_dev_read_resources(struct device *dev);
-void pci_bus_read_resources(struct device *dev);
-void pci_dev_set_resources(struct device *dev);
-unsigned int pci_scan_bridge(struct device *bus, unsigned int max);
+void pci_dev_read_resources(device_t dev);
+void pci_bus_read_resources(device_t dev);
+void pci_dev_set_resources(device_t dev);
+void pci_dev_enable_resources(device_t dev);
+void pci_bus_enable_resources(device_t dev);
+unsigned int pci_scan_bridge(device_t bus, unsigned int max);
+unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn, unsigned max_devfn, unsigned int max);
#define PCI_IO_BRIDGE_ALIGN 4096
#define PCI_MEM_BRIDGE_ALIGN (1024*1024)
diff --git a/src/include/device/resource.h b/src/include/device/resource.h
index 3042201..f90aba1 100644
--- a/src/include/device/resource.h
+++ b/src/include/device/resource.h
@@ -7,7 +7,7 @@
#define IORESOURCE_IO 0x00000100 /* Resource type */
#define IORESOURCE_MEM 0x00000200
#define IORESOURCE_IRQ 0x00000400
-#define IORESOURCE_DMA 0x00000800
+#define IORESOURCE_DRQ 0x00000800
#define IORESOURCE_PREFETCH 0x00001000 /* No side effects */
#define IORESOURCE_READONLY 0x00002000
@@ -15,8 +15,12 @@
#define IORESOURCE_RANGELENGTH 0x00008000
#define IORESOURCE_SHADOWABLE 0x00010000
#define IORESOURCE_BUS_HAS_VGA 0x00020000
+#define IORESOURCE_SUBTRACTIVE 0x00040000 /* This resource filters all of the unclaimed transactions
+ * to the bus below.
+ */
-#define IORESOURCE_SET 0x80000000
+#define IORESOURCE_SET 0x80000000 /* An IO resource that has been assigned a value */
+#define IORESOURCE_FIXED 0x40000000 /* An IO resource the allocator must not change */
/* PCI specific resource bits */
#define IORESOURCE_PCI64 (1<<0) /* 64bit long pci resource */