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Doxidization, reformat

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git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1469 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Li-Ta Lo
2004-03-23 21:28:05 +00:00
parent 9f46132e96
commit e52666931a
22 changed files with 572 additions and 289 deletions
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103
src/devices/chip.c
View File

@@ -9,8 +9,22 @@
#include <device/chip.h>
#include <device/pci.h>
void
chip_configure(struct chip *root, enum chip_pass pass)
/**
* @brief Configure static devices
*
* Starting from the static device 'root', walk the tree and configure each
* device by calling the device specific chip_control::enable().
*
* This function is only an iterator, the exact definition of 'configure'
* depends on the device specific implementation of chip_control::enable().
*
* @param root root of the static device tree to be configured.
* @param pass pass of the configuration operation to be perfromed.
*
* @see chip_pass
* @see chip_control::enable
*/
void chip_configure(struct chip *root, enum chip_pass pass)
{
struct chip *c;
@@ -25,24 +39,37 @@ chip_configure(struct chip *root, enum chip_pass pass)
}
}
/** Convert a static struct chip structure to a set of dynamic device structures.
* @param chip Static chip structure to start with.
/**
* @brief Convert static device structures to dynamic structures.
*
* A static device may contain one or more dynamic devices. Dynamic device
* structures of these devices have to be generated before the enumeration
* of dynamic devices. This function converts a static chip structure to a
* set of dynamic device structures.
*
* This function is the generic method called by enumerate_static_device_chain()
* for static devices. Devices extend this default behavior by defining their
* own chip_controll::enumerate(). Generally, device specific
* chip_control::enumerate() method calls this function as its last operation.
*
* @param chip static chip structure to be converted.
*
*/
void chip_enumerate(struct chip *chip)
{
struct chip *child;
device_t dev;
int link;
int i;
dev = 0;
link = 0;
#if 1
if (chip->control && chip->control->name) {
printk_debug("Enumerating: %s\n", chip->control->name);
}
#endif
for(i = 0; i < MAX_CHIP_PATHS; i++) {
for (i = 0; i < MAX_CHIP_PATHS; i++) {
int identical_paths;
identical_paths =
(i > 0) &&
@@ -55,6 +82,7 @@ void chip_enumerate(struct chip *chip)
parent = chip->bus;
switch(chip->path[i].path.type) {
case DEVICE_PATH_NONE:
/* no dynamic device associated */
break;
case DEVICE_PATH_PCI:
bus = chip->path[i].path.u.pci.bus;
@@ -62,7 +90,7 @@ void chip_enumerate(struct chip *chip)
device_t dev;
int i = 1;
dev = chip->dev;
while(dev && (i != bus)) {
while (dev && (i != bus)) {
dev = dev->next;
i++;
}
@@ -75,18 +103,21 @@ void chip_enumerate(struct chip *chip)
dev = alloc_dev(parent, &chip->path[i].path);
break;
}
}
else {
} else {
link += 1;
}
if (dev) {
struct chip_resource *res, *res_limit;
printk_spew("path (%p) %s %s", dev, dev_path(dev), identical_paths?"identical":"");
printk_spew(" parent: (%p) %s\n",dev->bus->dev, dev_path(dev->bus->dev));
printk_spew("path (%p) %s %s",
dev, dev_path(dev),
identical_paths?"identical":"");
printk_spew(" parent: (%p) %s\n",
dev->bus->dev, dev_path(dev->bus->dev));
dev->chip = chip;
dev->enable = chip->path[i].enable;
dev->links = link + 1;
for(child = chip->children; child; child = child->next) {
for (child = chip->children; child; child = child->next) {
if (!child->bus && child->link == i) {
child->bus = &dev->link[link];
}
@@ -102,21 +133,42 @@ void chip_enumerate(struct chip *chip)
}
}
}
if (dev && !chip->dev) {
chip->dev = dev;
}
}
for(child = chip->children; child; child = child->next) {
for (child = chip->children; child; child = child->next) {
if (!child->bus) {
child->bus = &chip->dev->link[0];
}
}
}
/**
* @brief Enumerate a static device tree.
*
* A static device chain is a linked list of static device structures which are
* on the same branch of the static device tree. This function does not only
* enumerate the devices on a single chain, as its name suggest, it also walks
* into the subordinary chains. It calls the device specific
* chip_control::enumerate() of the device if one exists or calls the generic
* chip_enumerate().
*
* This function is only an iterator, the exact definition of 'enumerate'
* depends on the implementation of the generic chip_enumerate() and/or device
* specific chip_control::enumerate().
*
* @param root static chip structure to start with.
*
* @see chip_control::enumerate()
*/
static void enumerate_static_device_chain(struct chip *root)
{
struct chip *chip;
for(chip = root; chip; chip = chip->next) {
for (chip = root; chip; chip = chip->next) {
void (*enumerate)(struct chip *chip);
enumerate = chip_enumerate;
if (chip->control && chip->control->enumerate) {
@@ -125,13 +177,30 @@ static void enumerate_static_device_chain(struct chip *root)
enumerate(chip);
}
for(chip = root; chip; chip = chip->next) {
for (chip = root; chip; chip = chip->next) {
if (chip->children) {
enumerate_static_device_chain(chip->children);
}
}
}
/**
* @brief Enumerate static devices in the system.
*
* \note The definition of 'enumerate' is not clear in this context. Does it mean
* probe ?
*
* \note How do we determine the existence of the static devices ? Static
* devices are listed in the config file and generated at compile time by config
* tool. This function is called at certain point in the early stage of
* LinuxBIOS. It uses the chip_enumerate() function to convert the static
* structures into dynamic ones. What if the static devices listed in the config
* file does actually not exist in the system ? Is there any side effect of
* these 'phantom' device structures
*
* The static device does not necesarry conform to the dynamic device tree in
* the system.
*/
void enumerate_static_devices(void)
{
enumerate_static_device_chain(&static_root);

173
src/devices/device.c
View File

@@ -22,24 +22,41 @@
#include <stdlib.h>
#include <string.h>
/* Linked list of ALL devices */
/** Linked list of ALL devices */
struct device *all_devices = &dev_root;
/* pointer to the last device */
/** Pointer to the last device */
static struct device **last_dev_p = &dev_root.next;
#define DEVICE_MEM_HIGH 0xFEC00000UL /* Reserve 20M for the system */
/** The upper limit of MEM resource of the devices.
* Reserve 20M for the system */
#define DEVICE_MEM_HIGH 0xFEC00000UL
/** The lower limit of IO resource of the devices.
* Reserve 4k for ISA/Legacy devices */
#define DEVICE_IO_START 0x1000
/** Allocate a new device structure
/**
* @brief Allocate a new device structure.
*
* Allocte a new device structure and attached it to the device tree as a child
* of the parent bus.
*
* @param parent parent bus the newly created device attached to.
* @param path path to the device to be created.
*
* @return pointer to the newly created device structure.
*
* @see device_path
*/
device_t alloc_dev(struct bus *parent, struct device_path *path)
{
device_t dev, child;
int link;
/* Find the last child of our parent */
for(child = parent->children; child && child->sibling; ) {
for (child = parent->children; child && child->sibling; ) {
child = child->sibling;
}
dev = malloc(sizeof(*dev));
if (dev == 0) {
die("DEV: out of memory.\n");
@@ -47,14 +64,14 @@ device_t alloc_dev(struct bus *parent, struct device_path *path)
memset(dev, 0, sizeof(*dev));
memcpy(&dev->path, path, sizeof(*path));
/* Append a new device to the global device chain.
* The chain is used to find devices once everything is set up.
/* Append a new device to the global device list.
* The list is used to find devices once everything is set up.
*/
*last_dev_p = dev;
last_dev_p = &dev->next;
/* Initialize the back pointers in the link fields */
for(link = 0; link < MAX_LINKS; link++) {
for (link = 0; link < MAX_LINKS; link++) {
dev->link[link].dev = dev;
dev->link[link].link = link;
}
@@ -66,12 +83,15 @@ device_t alloc_dev(struct bus *parent, struct device_path *path)
} else {
parent->children = dev;
}
/* If we don't have any other information about a device enable it */
dev->enable = 1;
return dev;
}
/** round a number to an alignment.
/**
* @brief round a number up to an alignment.
* @param val the starting value
* @param roundup Alignment as a power of two
* @returns rounded up number
@@ -104,7 +124,7 @@ static void read_resources(struct bus *bus)
struct device *curdev;
/* Walk through all of the devices and find which resources they need. */
for(curdev = bus->children; curdev; curdev = curdev->sibling) {
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
unsigned links;
int i;
if (curdev->resources > 0) {
@@ -112,20 +132,22 @@ static void read_resources(struct bus *bus)
}
if (!curdev->ops || !curdev->ops->read_resources) {
printk_err("%s missing read_resources\n",
dev_path(curdev));
dev_path(curdev));
continue;
}
if (!curdev->enable) {
continue;
}
curdev->ops->read_resources(curdev);
/* Read in subtractive resources behind the current device */
links = 0;
for(i = 0; i < curdev->resources; i++) {
for (i = 0; i < curdev->resources; i++) {
struct resource *resource;
resource = &curdev->resource[i];
if ((resource->flags & IORESOURCE_SUBTRACTIVE) &&
(!(links & (1 << resource->index))))
(!(links & (1 << resource->index))))
{
links |= (1 << resource->index);
read_resources(&curdev->link[resource->index]);
@@ -142,8 +164,8 @@ struct pick_largest_state {
int seen_last;
};
static void pick_largest_resource(
struct pick_largest_state *state, struct device *dev, struct resource *resource)
static void pick_largest_resource(struct pick_largest_state *state,
struct device *dev, struct resource *resource)
{
struct resource *last;
last = state->last;
@@ -152,32 +174,33 @@ static void pick_largest_resource(
state->seen_last = 1;
return;
}
if (last && (
(last->align < resource->align) ||
((last->align == resource->align) &&
(last->size < resource->size)) ||
((last->align == resource->align) &&
(last->size == resource->size) &&
(!state->seen_last)))) {
if (last &&
((last->align < resource->align) ||
((last->align == resource->align) &&
(last->size < resource->size)) ||
((last->align == resource->align) &&
(last->size == resource->size) &&
(!state->seen_last)))) {
return;
}
if (!state->result ||
(state->result->align < resource->align) ||
((state->result->align == resource->align) &&
(state->result->size < resource->size))) {
if (!state->result ||
(state->result->align < resource->align) ||
((state->result->align == resource->align) &&
(state->result->size < resource->size))) {
state->result_dev = dev;
state->result = resource;
}
}
}
static void find_largest_resource(struct pick_largest_state *state,
struct bus *bus, unsigned long type_mask, unsigned long type)
struct bus *bus, unsigned long type_mask,
unsigned long type)
{
struct device *curdev;
for(curdev = bus->children; curdev; curdev = curdev->sibling) {
for (curdev = bus->children; curdev; curdev = curdev->sibling) {
int i;
for(i = 0; i < curdev->resources; i++) {
for (i = 0; i < curdev->resources; i++) {
struct resource *resource = &curdev->resource[i];
/* If it isn't the right kind of resource ignore it */
if ((resource->flags & type_mask) != type) {
@@ -187,7 +210,8 @@ static void find_largest_resource(struct pick_largest_state *state,
if (resource->flags & IORESOURCE_SUBTRACTIVE) {
struct bus *subbus;
subbus = &curdev->link[resource->index];
find_largest_resource(state, subbus, type_mask, type);
find_largest_resource(state, subbus,
type_mask, type);
continue;
}
/* See if this is the largest resource */
@@ -196,8 +220,10 @@ static void find_largest_resource(struct pick_largest_state *state,
}
}
static struct device *largest_resource(struct bus *bus, struct resource **result_res,
unsigned long type_mask, unsigned long type)
static struct device *largest_resource(struct bus *bus,
struct resource **result_res,
unsigned long type_mask,
unsigned long type)
{
struct pick_largest_state state;
@@ -254,12 +280,12 @@ void compute_allocate_resource(
min_align = 0;
base = bridge->base;
printk_spew("%s compute_allocate_%s: base: %08lx size: %08lx align: %d gran: %d\n",
dev_path(bus->dev),
(bridge->flags & IORESOURCE_IO)? "io":
(bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
base, bridge->size, bridge->align, bridge->gran);
printk_spew("%s compute_allocate_%s: base: %08lx size: %08lx "
"align: %d gran: %d\n",
dev_path(bus->dev),
(bridge->flags & IORESOURCE_IO)? "io":
(bridge->flags & IORESOURCE_PREFETCH)? "prefmem" : "mem",
base, bridge->size, bridge->align, bridge->gran);
/* We want different minimum alignments for different kinds of
* resources. These minimums are not device type specific
@@ -278,8 +304,9 @@ void compute_allocate_resource(
/* Remember I haven't found anything yet. */
resource = 0;
/* Walk through all the devices on the current bus and compute the addresses */
while((dev = largest_resource(bus, &resource, type_mask, type))) {
/* Walk through all the devices on the current bus and compute the
* addresses */
while ((dev = largest_resource(bus, &resource, type_mask, type))) {
unsigned long size;
/* Do NOT I repeat do not ignore resources which have zero size.
* If they need to be ignored dev->read_resources should not even
@@ -357,6 +384,8 @@ void compute_allocate_resource(
static void allocate_vga_resource(void)
{
#warning "FIXME modify allocate_vga_resource so it is less pci centric!"
#warning "This function knows to much about PCI stuff, it should be just a ietrator/visitor."
/* FIXME handle the VGA pallette snooping */
struct device *dev, *vga;
struct bus *bus;
@@ -422,7 +451,7 @@ void enable_resources(struct device *dev)
*/
if (!dev->ops || !dev->ops->enable_resources) {
printk_err("%s missing enable_resources\n",
dev_path(dev));
dev_path(dev));
return;
}
if (!dev->enable) {
@@ -431,58 +460,74 @@ void enable_resources(struct device *dev)
dev->ops->enable_resources(dev);
}
/** Enumerate the resources on the PCI by calling pci_init
/**
* @brief Determine the existence of dynamic devices and construct dynamic
* device tree.
*
* Start for the root device 'dev_root', scan the buses in the system, build
* the dynamic device tree according to the result of the probe.
*
* This function have no idea how to scan and probe the buses and devices at
* all. It depends on the bus/device specific scan_bus() method to do it.
* The scan_bus() function also have to create the device structure and attach
* it to the device tree.
*/
void dev_enumerate(void)
{
struct device *root;
unsigned subordinate;
printk_info("Enumerating buses...");
printk_info("Enumerating buses...\n");
root = &dev_root;
subordinate = root->ops->scan_bus(root, 0);
printk_info("done\n");
}
/** Starting at the root, compute what resources are needed and allocate them.
/**
* @brief Configure devices on the devices tree.
*
* Starting at the root, compute what resources are needed and allocate them.
* I/O starts at PCI_IO_START. Since the assignment is hierarchical we
* set the values into the dev_root struct.
*/
void dev_configure(void)
{
struct device *root = &dev_root;
printk_info("Allocating resources...");
printk_debug("\n");
root->ops->read_resources(root);
/* Make certain the io devices are allocated somewhere
* safe.
*/
/* Make certain the io devices are allocated somewhere safe. */
root->resource[0].base = DEVICE_IO_START;
root->resource[0].flags |= IORESOURCE_ASSIGNED;
root->resource[0].flags &= ~IORESOURCE_STORED;
/* Now reallocate the pci resources memory with the
* highest addresses I can manage.
*/
/* Now reallocate the pci resources memory with the highest
* addresses I can manage.*/
root->resource[1].base =
round_down(DEVICE_MEM_HIGH - root->resource[1].size,
1UL << root->resource[1].align);
1UL << root->resource[1].align);
root->resource[1].flags |= IORESOURCE_ASSIGNED;
root->resource[1].flags &= ~IORESOURCE_STORED;
/* Allocate the VGA I/O resource..
*/
/* Allocate the VGA I/O resource.. */
allocate_vga_resource();
// now just set things into registers ... we hope ...
/* now just set things into registers ... we hope ... */
root->ops->set_resources(root);
printk_info("done.\n");
}
/** Starting at the root, walk the tree and enable all devices/bridges.
* What really happens is computed COMMAND bits get set in register 4
/**
* @brief Enable devices on the device tree.
*
* Starting at the root, walk the tree and enable all devices/bridges by
* calling the device's enable_resources() method.
*/
void dev_enable(void)
{
@@ -490,22 +535,28 @@ void dev_enable(void)
/* now enable everything. */
enable_resources(&dev_root);
printk_info("done.\n");
}
/** Starting at the root, walk the tree and call a driver to
* do device specific setup.
/**
* @brief Initialize all devices in the global device list.
*
* Starting at the first device on the global device link list,
* walk the list and call a driver to do device specific setup.
*/
void dev_initialize(void)
{
struct device *dev;
printk_info("Initializing devices...\n");
for (dev = all_devices; dev; dev = dev->next) {
if (dev->enable && dev->ops && dev->ops->init) {
printk_debug("%s init\n", dev_path(dev));
dev->ops->init(dev);
}
}
printk_info("Devices initialized\n");
}

7
src/devices/device_util.c
View File

@@ -6,15 +6,16 @@
/**
* See if a device structure already exists and if not allocate it
* @brief See if a device structure already exists and if not allocate it
*
* @param bus The bus to find the device on
* @param path The relative path from the bus to the appropriate device
* @return pointer a device structure for the device on bus at path
* @return pointer to a device structure for the device on bus at path
*/
device_t alloc_find_dev(struct bus *parent, struct device_path *path)
{
device_t child;
for(child = parent->children; child; child = child->sibling) {
for (child = parent->children; child; child = child->sibling) {
if (path_eq(path, &child->path)) {
return child;
}

296
src/devices/pci_device.c
View File

@@ -151,7 +151,7 @@ static void pci_read_bases(struct device *dev, unsigned int howmany)
{
unsigned long index;
for(index = PCI_BASE_ADDRESS_0; (index < PCI_BASE_ADDRESS_0 + (howmany << 2)); ) {
for (index = PCI_BASE_ADDRESS_0; (index < PCI_BASE_ADDRESS_0 + (howmany << 2)); ) {
struct resource *resource;
resource = pci_get_resource(dev, index);
index += (resource->flags & IORESOURCE_PCI64)?8:4;
@@ -159,7 +159,6 @@ static void pci_read_bases(struct device *dev, unsigned int howmany)
compact_resources(dev);
}
static void pci_bridge_read_bases(struct device *dev)
{
struct resource *resource;
@@ -174,7 +173,7 @@ static void pci_bridge_read_bases(struct device *dev)
resource->limit = 0xffffUL;
resource->flags |= IORESOURCE_IO | IORESOURCE_PCI_BRIDGE;
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_IO, IORESOURCE_IO);
IORESOURCE_IO, IORESOURCE_IO);
/* Initiliaze the prefetchable memory constraints on the current bus */
resource = get_resource(dev, PCI_PREF_MEMORY_BASE);
@@ -185,8 +184,8 @@ static void pci_bridge_read_bases(struct device *dev)
resource->flags = IORESOURCE_MEM | IORESOURCE_PREFETCH | IORESOURCE_PCI_BRIDGE;
resource->index = PCI_PREF_MEMORY_BASE;
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM | IORESOURCE_PREFETCH);
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM | IORESOURCE_PREFETCH);
/* Initialize the memory resources on the current bus */
resource = get_resource(dev, PCI_MEMORY_BASE);
@@ -196,17 +195,18 @@ static void pci_bridge_read_bases(struct device *dev)
resource->limit = 0xffffffffUL;
resource->flags = IORESOURCE_MEM | IORESOURCE_PCI_BRIDGE;
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM);
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM);
compact_resources(dev);
}
void pci_dev_read_resources(struct device *dev)
{
uint32_t addr;
pci_read_bases(dev, 6);
addr = pci_read_config32(dev, PCI_ROM_ADDRESS);
dev->rom_address = (addr == 0xffffffff)? 0 : addr;
}
@@ -214,14 +214,29 @@ void pci_dev_read_resources(struct device *dev)
void pci_bus_read_resources(struct device *dev)
{
uint32_t addr;
pci_bridge_read_bases(dev);
pci_read_bases(dev, 2);
addr = pci_read_config32(dev, PCI_ROM_ADDRESS1);
dev->rom_address = (addr == 0xffffffff)? 0 : addr;
}
/**
* @brief round a number up to an alignment.
* @param val the starting value
* @param roundup Alignment as a power of two
* @returns rounded up number
*/
static unsigned long round(unsigned long val, unsigned long roundup)
{
/* ROUNDUP MUST BE A POWER OF TWO. */
unsigned long inverse;
inverse = ~(roundup - 1);
val += (roundup - 1);
val &= inverse;
return val;
}
static void pci_set_resource(struct device *dev, struct resource *resource)
{
@@ -230,11 +245,10 @@ static void pci_set_resource(struct device *dev, struct resource *resource)
unsigned long gran;
/* Make certain the resource has actually been set */
if (!(resource->flags & IORESOURCE_ASSIGNED)) {
#if 1
printk_err("ERROR: %s %02x not allocated\n",
dev_path(dev), resource->index);
#endif
dev_path(dev), resource->index);
return;
}
@@ -256,8 +270,10 @@ static void pci_set_resource(struct device *dev, struct resource *resource)
if (resource->flags & IORESOURCE_PCI_BRIDGE) {
dev->command |= PCI_COMMAND_MASTER;
}
/* Get the base address */
base = resource->base;
/* Get the resource granularity */
gran = 1UL << resource->gran;
@@ -268,15 +284,13 @@ static void pci_set_resource(struct device *dev, struct resource *resource)
*/
/* Get the limit (rounded up) */
limit = base + ((resource->size + gran - 1UL) & ~(gran - 1UL)) -1UL;
limit = base + round(resource->size, gran) - 1UL;
/* Now store the resource */
resource->flags |= IORESOURCE_STORED;
if (!(resource->flags & IORESOURCE_PCI_BRIDGE)) {
/*
* some chipsets allow us to set/clear the IO bit.
* (e.g. VIA 82c686a.) So set it to be safe)
*/
/* some chipsets allow us to set/clear the IO bit.
* (e.g. VIA 82c686a.) So set it to be safe) */
limit = base + resource->size -1;
if (resource->flags & IORESOURCE_IO) {
base |= PCI_BASE_ADDRESS_SPACE_IO;
@@ -286,58 +300,50 @@ static void pci_set_resource(struct device *dev, struct resource *resource)
/* FIXME handle real 64bit base addresses */
pci_write_config32(dev, resource->index + 4, 0);
}
}
else if (resource->index == PCI_IO_BASE) {
} else if (resource->index == PCI_IO_BASE) {
/* set the IO ranges
* WARNING: we don't really do 32-bit addressing for IO yet!
*/
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_IO, IORESOURCE_IO);
IORESOURCE_IO, IORESOURCE_IO);
pci_write_config8(dev, PCI_IO_BASE, base >> 8);
pci_write_config8(dev, PCI_IO_LIMIT, limit >> 8);
pci_write_config16(dev, PCI_IO_BASE_UPPER16, 0);
pci_write_config16(dev, PCI_IO_LIMIT_UPPER16, 0);
}
else if (resource->index == PCI_MEMORY_BASE) {
/* set the memory range
*/
} else if (resource->index == PCI_MEMORY_BASE) {
/* set the memory range */
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM);
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM);
pci_write_config16(dev, PCI_MEMORY_BASE, base >> 16);
pci_write_config16(dev, PCI_MEMORY_LIMIT, limit >> 16);
}
else if (resource->index == PCI_PREF_MEMORY_BASE) {
} else if (resource->index == PCI_PREF_MEMORY_BASE) {
/* set the prefetchable memory range
* WARNING: we don't really do 64-bit addressing for prefetchable memory yet!
*/
* WARNING: we don't really do 64-bit addressing for
* prefetchable memory yet! */
compute_allocate_resource(&dev->link[0], resource,
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM | IORESOURCE_PREFETCH);
IORESOURCE_MEM | IORESOURCE_PREFETCH,
IORESOURCE_MEM | IORESOURCE_PREFETCH);
pci_write_config16(dev, PCI_PREF_MEMORY_BASE, base >> 16);
pci_write_config16(dev, PCI_PREF_MEMORY_LIMIT, limit >> 16);
pci_write_config32(dev, PCI_PREF_BASE_UPPER32, 0);
pci_write_config32(dev, PCI_PREF_LIMIT_UPPER32, 0);
}
else {
} else {
/* Don't let me think I stored the resource */
resource->flags &= ~IORESOURCE_STORED;
printk_err("ERROR: invalid resource->index %x\n",
resource->index);
resource->index);
}
buf[0] = '\0';
if (resource->flags & IORESOURCE_PCI_BRIDGE) {
sprintf(buf, "bus %d ", dev->link[0].secondary);
}
printk_debug(
"%s %02x <- [0x%08lx - 0x%08lx] %s%s\n",
dev_path(dev),
resource->index,
resource->base, limit,
buf,
(resource->flags & IORESOURCE_IO)? "io":
(resource->flags & IORESOURCE_PREFETCH)? "prefmem": "mem");
printk_debug("%s %02x <- [0x%08lx - 0x%08lx] %s%s\n",
dev_path(dev), resource->index, resource->base,
limit, buf,
(resource->flags & IORESOURCE_IO)? "io":
(resource->flags & IORESOURCE_PREFETCH)? "prefmem": "mem");
return;
}
@@ -348,11 +354,11 @@ void pci_dev_set_resources(struct device *dev)
uint8_t line;
last = &dev->resource[dev->resources];
for(resource = &dev->resource[0]; resource < last; resource++) {
for (resource = &dev->resource[0]; resource < last; resource++) {
pci_set_resource(dev, resource);
}
for(link = 0; link < dev->links; link++) {
for (link = 0; link < dev->links; link++) {
struct bus *bus;
bus = &dev->link[link];
if (bus->children) {
@@ -401,43 +407,55 @@ void pci_bus_enable_resources(struct device *dev)
pci_dev_enable_resources(dev);
}
/** Default device operation for PCI devices */
struct device_operations default_pci_ops_dev = {
.read_resources = pci_dev_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_dev_enable_resources,
.init = 0,
.scan_bus = 0,
.init = 0,
.scan_bus = 0,
};
/** Default device operations for PCI bridges */
struct device_operations default_pci_ops_bus = {
.read_resources = pci_bus_read_resources,
.set_resources = pci_dev_set_resources,
.enable_resources = pci_bus_enable_resources,
.init = 0,
.scan_bus = pci_scan_bridge,
.init = 0,
.scan_bus = pci_scan_bridge,
};
/**
* @brief Set up PCI device operation
*
*
* @param dev
*
* @see pci_drivers
*/
static void set_pci_ops(struct device *dev)
{
struct pci_driver *driver;
if (dev->ops) {
return;
}
/* Look through the list of setup drivers and find one for
* this pci device
*/
for(driver = &pci_drivers[0]; driver != &epci_drivers[0]; driver++) {
* this pci device */
for (driver = &pci_drivers[0]; driver != &epci_drivers[0]; driver++) {
if ((driver->vendor == dev->vendor) &&
(driver->device == dev->device)) {
(driver->device == dev->device)) {
dev->ops = driver->ops;
#if 1
printk_debug("%s [%04x/%04x] %sops\n",
dev_path(dev),
driver->vendor, driver->device,
(driver->ops->scan_bus?"bus ":"")
);
#endif
printk_debug("%s [%04x/%04x] %sops\n", dev_path(dev),
driver->vendor, driver->device,
(driver->ops->scan_bus?"bus ":""));
return;
}
}
/* If I don't have a specific driver use the default operations */
switch(dev->hdr_type & 0x7f) { /* header type */
case PCI_HEADER_TYPE_NORMAL: /* standard header */
@@ -454,27 +472,35 @@ static void set_pci_ops(struct device *dev)
bad:
if (dev->enable) {
printk_err("%s [%04x/%04x/%06x] has unknown header "
"type %02x, ignoring.\n",
dev_path(dev),
dev->vendor, dev->device,
dev->class >> 8, dev->hdr_type);
"type %02x, ignoring.\n",
dev_path(dev),
dev->vendor, dev->device,
dev->class >> 8, dev->hdr_type);
}
}
return;
}
/**
* Given a bus and a devfn number, find the device structure
* @param bus The bus structure
* @brief Find a specific device structure on a list of device structures
*
* Given a linked list of PCI device structures and a devfn number, find the
* device structure correspond to the devfn.
*
* @param list the device structure list
* @param devfn a device/function number
* @return pointer to the device structure
*
* @return pointer to the device structure found
*/
static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn)
static struct device *pci_scan_get_dev(struct device **list,
unsigned int devfn)
{
struct device *dev = 0;
for(; *list; list = &(*list)->sibling) {
for (; *list; list = &(*list)->sibling) {
if ((*list)->path.type != DEVICE_PATH_PCI) {
printk_err("child %s not a pci device\n", dev_path(*list));
printk_err("child %s not a pci device\n",
dev_path(*list));
continue;
}
if ((*list)->path.u.pci.devfn == devfn) {
@@ -485,10 +511,13 @@ static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn)
break;
}
}
/* FIXME: why are we doing this ? Isn't there some order between the
* structures before ? */
if (dev) {
device_t child;
/* Find the last child of our parent */
for(child = dev->bus->children; child && child->sibling; ) {
for (child = dev->bus->children; child && child->sibling; ) {
child = child->sibling;
}
/* Place the device on the list of children of it's parent. */
@@ -502,16 +531,24 @@ static struct device *pci_scan_get_dev(struct device **list, unsigned int devfn)
return dev;
}
/** Scan the pci bus devices and bridges.
/**
* @brief Scan a PCI bus
*
* Determine the existence of devices and bridges on a PCI bus. If there are
* bridges on the bus, recursively scan the buses behind the bridges.
*
* This function is the default scan_bus() method for the root device
* 'dev_root'.
*
* @param bus pointer to the bus structure
* @param min_devfn minimum devfn to look at in the scan usually 0x00
* @param max_devfn maximum devfn to look at in the scan usually 0xff
* @param max current bus number
*
* @return The maximum bus number found, after scanning all subordinate busses
*/
unsigned int pci_scan_bus(struct bus *bus,
unsigned min_devfn, unsigned max_devfn,
unsigned int max)
unsigned int pci_scan_bus(struct bus *bus, unsigned min_devfn,
unsigned max_devfn, unsigned int max)
{
unsigned int devfn;
device_t dev;
@@ -524,42 +561,50 @@ unsigned int pci_scan_bus(struct bus *bus,
bus->children = 0;
post_code(0x24);
/* probe all devices on this bus with some optimization for non-existance and
single funcion devices */
/* probe all devices on this bus with some optimization for
* non-existence and single funcion devices */
for (devfn = min_devfn; devfn <= max_devfn; devfn++) {
uint32_t id, class;
uint8_t hdr_type;
/* First thing setup the device structure */
/* device structures for PCI devices associated with static
* devices are already created during the static device
* enumeration, find out if it is the case for this devfn */
dev = pci_scan_get_dev(&old_devices, devfn);
/* Detect if a device is present */
if (!dev) {
/* it's not associated with a static device, detect if
* this device is present */
struct device dummy;
dummy.bus = bus;
dummy.path.type = DEVICE_PATH_PCI;
dummy.path.u.pci.devfn = devfn;
id = pci_read_config32(&dummy, PCI_VENDOR_ID);
/* some broken boards return 0 if a slot is empty: */
if ( (id == 0xffffffff) || (id == 0x00000000) ||
(id == 0x0000ffff) || (id == 0xffff0000))
{
printk_spew("PCI: devfn 0x%x, bad id 0x%x\n", devfn, id);
if ((id == 0xffffffff) || (id == 0x00000000) ||
(id == 0x0000ffff) || (id == 0xffff0000)) {
printk_spew("PCI: devfn 0x%x, bad id 0x%x\n",
devfn, id);
if (PCI_FUNC(devfn) == 0x00) {
/* if this is a function 0 device and it is not present,
skip to next device */
/* if this is a function 0 device and
* it is not present, skip to next
* device */
devfn += 0x07;
}
/* multi function device, skip to next function */
/* this function in a multi function device is
* not present, skip to next function */
continue;
}
dev = alloc_dev(bus, &dummy.path);
}
else {
/* Run the magic enable sequence for the device */
if (dev->chip && dev->chip->control && dev->chip->control->enable_dev) {
} else {
/* Run the magic enable/disable sequence for the
* device */
/* FIXME: What happen if this PCI device listed as
* static device but does not exist ? This calls
* some arbitray code without any justification */
if (dev->chip && dev->chip->control &&
dev->chip->control->enable_dev) {
int enable = dev->enable;
dev->enable = 1;
dev->chip->control->enable_dev(dev);
@@ -580,14 +625,15 @@ unsigned int pci_scan_bus(struct bus *bus,
dev->class = class >> 8;
/* Look at the vendor and device id, or at least the
* header type and class and figure out which set of configuration
* methods to use. Unless we already have some pci ops.
* header type and class and figure out which set of
* configuration methods to use. Unless we already
* have some pci ops.
*/
set_pci_ops(dev);
/* Error if we don't have some pci operations for it */
if (!dev->ops) {
printk_err("%s No device operations\n",
dev_path(dev));
dev_path(dev));
continue;
}
@@ -600,24 +646,28 @@ unsigned int pci_scan_bus(struct bus *bus,
}
printk_debug("%s [%04x/%04x] %s\n",
dev_path(dev),
dev->vendor, dev->device,
dev->enable?"enabled": "disabled");
dev_path(dev),
dev->vendor, dev->device,
dev->enable?"enabled": "disabled");
if (PCI_FUNC(devfn) == 0x00 && (hdr_type & 0x80) != 0x80) {
/* if this is not a multi function device, don't waste time probe
another function. Skip to next device. */
/* if this is not a multi function device, don't
* waste time probe another function.
* Skip to next device. */
devfn += 0x07;
}
}
post_code(0x25);
for(child = bus->children; child; child = child->sibling) {
/* if the child provides scan_bus(), for example a bridge, scan the
* bus behind that child */
for (child = bus->children; child; child = child->sibling) {
if (!child->ops->scan_bus) {
continue;
}
max = child->ops->scan_bus(child, max);
}
/*
* We've scanned the bus and so we know all about what's on
* the other side of any bridges that may be on this bus plus
@@ -630,8 +680,17 @@ unsigned int pci_scan_bus(struct bus *bus,
return max;
}
/** Scan the bus, first for bridges and next for devices.
* @param pci_bus pointer to the bus structure
/**
* @brief Scan a PCI bridge and the buses behind the bridge.
*
* Determine the existence of buses behind the bridge. Set up the bridge
* according to the result of the scan.
*
* This function is the default scan_bus() method for PCI bridge devices.
*
* @param dev pointer to the bridge device
* @param max the highest bus number assgined up to now
*
* @return The maximum bus number found, after scanning all subordinate busses
*/
unsigned int pci_scan_bridge(struct device *dev, unsigned int max)
@@ -645,47 +704,44 @@ unsigned int pci_scan_bridge(struct device *dev, unsigned int max)
/* Set up the primary, secondary and subordinate bus numbers. We have
* no idea how many buses are behind this bridge yet, so we set the
* subordinate bus number to 0xff for the moment
*/
* subordinate bus number to 0xff for the moment. */
bus->secondary = ++max;
bus->subordinate = 0xff;
/* Clear all status bits and turn off memory, I/O and master enables. */
cr = pci_read_config16(dev, PCI_COMMAND);
pci_write_config16(dev, PCI_COMMAND, 0x0000);
pci_write_config16(dev, PCI_STATUS, 0xffff);
/*
* Read the existing primary/secondary/subordinate bus
* number configuration.
*/
/* Read the existing primary/secondary/subordinate bus
* number configuration. */
buses = pci_read_config32(dev, PCI_PRIMARY_BUS);
/* Configure the bus numbers for this bridge: the configuration
* transactions will not be propagated by the bridge if it is not
* correctly configured
*/
* correctly configured */
buses &= 0xff000000;
buses |= (((unsigned int) (dev->bus->secondary) << 0) |
((unsigned int) (bus->secondary) << 8) |
((unsigned int) (bus->subordinate) << 16));
((unsigned int) (bus->secondary) << 8) |
((unsigned int) (bus->subordinate) << 16));
pci_write_config32(dev, PCI_PRIMARY_BUS, buses);
/* Now we can scan all subordinate buses i.e. the bus hehind the bridge */
/* Now we can scan all subordinate buses i.e. the buses behind the
* bridge */
max = pci_scan_bus(bus, 0x00, 0xff, max);
/* We know the number of buses behind this bridge. Set the subordinate
* bus number to its real value
*/
* bus number to its real value */
bus->subordinate = max;
buses = (buses & 0xff00ffff) |
((unsigned int) (bus->subordinate) << 16);
pci_write_config32(dev, PCI_PRIMARY_BUS, buses);
pci_write_config16(dev, PCI_COMMAND, cr);
printk_spew("%s returns max %d\n", __FUNCTION__, max);
return max;
}
/*
Tell the EISA int controller this int must be level triggered
THIS IS A KLUDGE -- sorry, this needs to get cleaned up.

38
src/devices/root_device.c
View File

@@ -21,9 +21,9 @@ void root_dev_read_resources(device_t root)
root->resource[res].flags = IORESOURCE_IO;
root->resource[res].index = 0;
printk_spew("%s . link %p, resource %p\n", __FUNCTION__,
&root->link[0], &root->resource[res]);
&root->link[0], &root->resource[res]);
compute_allocate_resource(&root->link[0], &root->resource[res],
IORESOURCE_IO, IORESOURCE_IO);
IORESOURCE_IO, IORESOURCE_IO);
res++;
/* Initialize the system wide memory resources constraints */
@@ -35,9 +35,9 @@ void root_dev_read_resources(device_t root)
root->resource[res].flags = IORESOURCE_MEM;
root->resource[res].index = 1;
printk_spew("%s . link %p, resource %p\n", __FUNCTION__,
&root->link[0], &root->resource[res]);
&root->link[0], &root->resource[res]);
compute_allocate_resource(&root->link[0], &root->resource[res],
IORESOURCE_MEM, IORESOURCE_MEM);
IORESOURCE_MEM, IORESOURCE_MEM);
res++;
root->resources = res;
@@ -51,12 +51,12 @@ void root_dev_read_resources(device_t root)
*/
void root_dev_set_resources(device_t root)
{
struct bus *bus;
bus = &root->link[0];
compute_allocate_resource(bus,
&root->resource[0], IORESOURCE_IO, IORESOURCE_IO);
compute_allocate_resource(bus,
&root->resource[1], IORESOURCE_MEM, IORESOURCE_MEM);
struct bus *bus = &root->link[0];
compute_allocate_resource(bus, &root->resource[0],
IORESOURCE_IO, IORESOURCE_IO);
compute_allocate_resource(bus, &root->resource[1],
IORESOURCE_MEM, IORESOURCE_MEM);
assign_resources(bus);
}
@@ -71,18 +71,18 @@ unsigned int walk_static_devices(device_t bus, unsigned int max)
{
device_t child;
unsigned link;
for(link = 0; link < bus->links; link++) {
for(child = bus->link[link].children; child; child = child->sibling) {
for (link = 0; link < bus->links; link++) {
for (child = bus->link[link].children; child; child = child->sibling) {
if (child->ops && child->ops->enable) {
child->ops->enable(child);
}
printk_debug("%s %s\n",
dev_path(child),
child->enable?"enabled": "disabled");
printk_debug("%s %s\n", dev_path(child),
child->enable?"enabled": "disabled");
}
}
for(link = 0; link < bus->links; link++) {
for(child = bus->link[link].children; child; child = child->sibling) {
for (link = 0; link < bus->links; link++) {
for (child = bus->link[link].children; child; child = child->sibling) {
if (!child->ops || !child->ops->scan_bus)
continue;
printk_debug("%s scanning...\n", dev_path(child));
@@ -95,9 +95,9 @@ unsigned int walk_static_devices(device_t bus, unsigned int max)
void enable_childrens_resources(device_t dev)
{
unsigned link;
for(link = 0; link < dev->links; link++) {
for (link = 0; link < dev->links; link++) {
device_t child;
for(child = dev->link[link].children; child; child = child->sibling) {
for (child = dev->link[link].children; child; child = child->sibling) {
enable_resources(child);
}
}