// SPDX-License-Identifier: GPL-2.0-or-later
/*
* drivers . c
*
* Copyright ( c ) 1999 The Puffin Group
* Copyright ( c ) 2001 Matthew Wilcox for Hewlett Packard
* Copyright ( c ) 2001 - 2023 Helge Deller < deller @ gmx . de >
* Copyright ( c ) 2001 , 2002 Ryan Bradetich
* Copyright ( c ) 2004 - 2005 Thibaut VARENE < varenet @ parisc - linux . org >
*
* The file handles registering devices and drivers , then matching them .
* It ' s the closest we get to a dating agency .
*
* If you ' re thinking about modifying this file , here are some gotchas to
* bear in mind :
* - 715 / Mirage device paths have a dummy device between Lasi and its children
* - The EISA adapter may show up as a sibling or child of Wax
* - Dino has an optionally functional serial port . If firmware enables it ,
* it shows up as a child of Dino . If firmware disables it , the buswalk
* finds it and it shows up as a child of Cujo
* - Dino has both parisc and pci devices as children
* - parisc devices are discovered in a random order , including children
* before parents in some cases .
*/
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/export.h>
#include <linux/dma-map-ops.h>
#include <asm /hardware.h>
#include <asm /io.h>
#include <asm /pdc.h>
#include <asm /parisc-device.h>
#include <asm /ropes.h>
/* See comments in include/asm-parisc/pci.h */
const struct dma_map_ops *hppa_dma_ops __ro_after_init;
EXPORT_SYMBOL(hppa_dma_ops);
static struct device root = {
.init_name = "parisc" ,
};
static inline int check_dev(struct device *dev)
{
if (dev->bus == &parisc_bus_type) {
struct parisc_device *pdev;
pdev = to_parisc_device(dev);
return pdev->id.hw_type != HPHW_FAULTY;
}
return 1 ;
}
static struct device *
parse_tree_node(struct device *parent, int index, struct hardware_path *modpath);
struct recurse_struct {
void * obj;
int (*fn)(struct device *, void *);
};
static int descend_children(struct device * dev, void * data)
{
struct recurse_struct * recurse_data = (struct recurse_struct *)data;
if (recurse_data->fn(dev, recurse_data->obj))
return 1 ;
else
return device_for_each_child(dev, recurse_data, descend_children);
}
/**
* for_each_padev - Iterate over all devices in the tree
* @ fn : Function to call for each device .
* @ data : Data to pass to the called function .
*
* This performs a depth - first traversal of the tree , calling the
* function passed for each node . It calls the function for parents
* before children .
*/
static int for_each_padev(int (*fn)(struct device *, void *), void * data)
{
struct recurse_struct recurse_data = {
.obj = data,
.fn = fn,
};
return device_for_each_child(&root, &recurse_data, descend_children);
}
/**
* match_device - Report whether this driver can handle this device
* @ driver : the PA - RISC driver to try
* @ dev : the PA - RISC device to try
*/
static int match_device(const struct parisc_driver *driver, struct parisc_device *dev)
{
const struct parisc_device_id *ids;
for (ids = driver->id_table; ids->sversion; ids++) {
if ((ids->sversion != SVERSION_ANY_ID) &&
(ids->sversion != dev->id.sversion))
continue ;
if ((ids->hw_type != HWTYPE_ANY_ID) &&
(ids->hw_type != dev->id.hw_type))
continue ;
if ((ids->hversion != HVERSION_ANY_ID) &&
(ids->hversion != dev->id.hversion))
continue ;
return 1 ;
}
return 0 ;
}
static int parisc_driver_probe(struct device *dev)
{
int rc;
struct parisc_device *pa_dev = to_parisc_device(dev);
struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);
rc = pa_drv->probe(pa_dev);
if (!rc)
pa_dev->driver = pa_drv;
return rc;
}
static void __exit parisc_driver_remove(struct device *dev)
{
struct parisc_device *pa_dev = to_parisc_device(dev);
struct parisc_driver *pa_drv = to_parisc_driver(dev->driver);
if (pa_drv->remove)
pa_drv->remove(pa_dev);
}
/**
* register_parisc_driver - Register this driver if it can handle a device
* @ driver : the PA - RISC driver to try
*/
int register_parisc_driver(struct parisc_driver *driver)
{
/* FIXME: we need this because apparently the sti
* driver can be registered twice */
if (driver->drv.name) {
pr_warn("BUG: skipping previously registered driver %s\n" ,
driver->name);
return 1 ;
}
if (!driver->probe) {
pr_warn("BUG: driver %s has no probe routine\n" , driver->name);
return 1 ;
}
driver->drv.bus = &parisc_bus_type;
/* We install our own probe and remove routines */
WARN_ON(driver->drv.probe != NULL);
WARN_ON(driver->drv.remove != NULL);
driver->drv.name = driver->name;
return driver_register(&driver->drv);
}
EXPORT_SYMBOL(register_parisc_driver);
struct match_count {
struct parisc_driver * driver;
int count;
};
static int match_and_count(struct device * dev, void * data)
{
struct match_count * m = data;
struct parisc_device * pdev = to_parisc_device(dev);
if (check_dev(dev)) {
if (match_device(m->driver, pdev))
m->count++;
}
return 0 ;
}
/**
* count_parisc_driver - count # of devices this driver would match
* @ driver : the PA - RISC driver to try
*
* Use by IOMMU support to " guess " the right size IOPdir .
* Formula is something like memsize / ( num_iommu * entry_size ) .
*/
int __init count_parisc_driver(struct parisc_driver *driver)
{
struct match_count m = {
.driver = driver,
.count = 0 ,
};
for_each_padev(match_and_count, &m);
return m.count;
}
/**
* unregister_parisc_driver - Unregister this driver from the list of drivers
* @ driver : the PA - RISC driver to unregister
*/
int unregister_parisc_driver(struct parisc_driver *driver)
{
driver_unregister(&driver->drv);
return 0 ;
}
EXPORT_SYMBOL(unregister_parisc_driver);
struct find_data {
unsigned long hpa;
struct parisc_device * dev;
};
static int find_device(struct device * dev, void * data)
{
struct parisc_device * pdev = to_parisc_device(dev);
struct find_data * d = (struct find_data*)data;
if (check_dev(dev)) {
if (pdev->hpa.start == d->hpa) {
d->dev = pdev;
return 1 ;
}
}
return 0 ;
}
static struct parisc_device *find_device_by_addr(unsigned long hpa)
{
struct find_data d = {
.hpa = hpa,
};
int ret;
ret = for_each_padev(find_device, &d);
return ret ? d.dev : NULL;
}
static int __init is_IKE_device(struct device *dev, void *data)
{
struct parisc_device *pdev = to_parisc_device(dev);
if (!check_dev(dev))
return 0 ;
if (pdev->id.hw_type != HPHW_BCPORT)
return 0 ;
if (IS_IKE(pdev) ||
(pdev->id.hversion == REO_MERCED_PORT) ||
(pdev->id.hversion == REOG_MERCED_PORT)) {
return 1 ;
}
return 0 ;
}
int __init machine_has_merced_bus(void )
{
int ret;
ret = for_each_padev(is_IKE_device, NULL);
return ret ? 1 : 0 ;
}
/**
* find_pa_parent_type - Find a parent of a specific type
* @ padev : The device to start searching from
* @ type : The device type to search for .
*
* Walks up the device tree looking for a device of the specified type .
* If it finds it , it returns it . If not , it returns NULL .
*/
const struct parisc_device *
find_pa_parent_type(const struct parisc_device *padev, int type)
{
const struct device *dev = &padev->dev;
while (dev != &root) {
struct parisc_device *candidate = to_parisc_device(dev);
if (candidate->id.hw_type == type)
return candidate;
dev = dev->parent;
}
return NULL;
}
/*
* get_node_path fills in @ path with the firmware path to the device .
* Note that if @ node is a parisc device , we don ' t fill in the ' mod ' field .
* This is because both callers pass the parent and fill in the mod
* themselves . If @ node is a PCI device , we do fill it in , even though this
* is inconsistent .
*/
static void get_node_path(struct device *dev, struct hardware_path *path)
{
int i = 5 ;
memset(&path->bc, -1 , 6 );
if (dev_is_pci(dev)) {
unsigned int devfn = to_pci_dev(dev)->devfn;
path->mod = PCI_FUNC(devfn);
path->bc[i--] = PCI_SLOT(devfn);
dev = dev->parent;
}
while (dev != &root) {
if (dev_is_pci(dev)) {
unsigned int devfn = to_pci_dev(dev)->devfn;
path->bc[i--] = PCI_SLOT(devfn) | (PCI_FUNC(devfn)<< 5 );
} else if (dev->bus == &parisc_bus_type) {
path->bc[i--] = to_parisc_device(dev)->hw_path;
}
dev = dev->parent;
}
}
static char *print_hwpath(struct hardware_path *path, char *output)
{
int i;
for (i = 0 ; i < 6 ; i++) {
if (path->bc[i] == -1 )
continue ;
output += sprintf(output, "%u/" , (unsigned char ) path->bc[i]);
}
output += sprintf(output, "%u" , (unsigned char ) path->mod);
return output;
}
/**
* print_pa_hwpath - Returns hardware path for PA devices
* @ dev : The device to return the path for
* @ output : Pointer to a previously - allocated array to place the path in .
*
* This function fills in the output array with a human - readable path
* to a PA device . This string is compatible with that used by PDC , and
* may be printed on the outside of the box .
*/
char *print_pa_hwpath(struct parisc_device *dev, char *output)
{
struct hardware_path path;
get_node_path(dev->dev.parent, &path);
path.mod = dev->hw_path;
return print_hwpath(&path, output);
}
EXPORT_SYMBOL(print_pa_hwpath);
#if defined (CONFIG_PCI) || defined (CONFIG_ISA)
/**
* get_pci_node_path - Determines the hardware path for a PCI device
* @ pdev : The device to return the path for
* @ path : Pointer to a previously - allocated array to place the path in .
*
* This function fills in the hardware_path structure with the route to
* the specified PCI device . This structure is suitable for passing to
* PDC calls .
*/
void get_pci_node_path(struct pci_dev *pdev, struct hardware_path *path)
{
get_node_path(&pdev->dev, path);
}
EXPORT_SYMBOL(get_pci_node_path);
/**
* print_pci_hwpath - Returns hardware path for PCI devices
* @ dev : The device to return the path for
* @ output : Pointer to a previously - allocated array to place the path in .
*
* This function fills in the output array with a human - readable path
* to a PCI device . This string is compatible with that used by PDC , and
* may be printed on the outside of the box .
*/
char *print_pci_hwpath(struct pci_dev *dev, char *output)
{
struct hardware_path path;
get_pci_node_path(dev, &path);
return print_hwpath(&path, output);
}
EXPORT_SYMBOL(print_pci_hwpath);
#endif /* defined(CONFIG_PCI) || defined(CONFIG_ISA) */
static void setup_bus_id(struct parisc_device *padev)
{
struct hardware_path path;
char name[28 ];
char *output = name;
int i;
get_node_path(padev->dev.parent, &path);
for (i = 0 ; i < 6 ; i++) {
if (path.bc[i] == -1 )
continue ;
output += sprintf(output, "%u:" , (unsigned char ) path.bc[i]);
}
sprintf(output, "%u" , (unsigned char ) padev->hw_path);
dev_set_name(&padev->dev, name);
}
static struct parisc_device * __init create_tree_node(char id,
struct device *parent)
{
struct parisc_device *dev = kzalloc(sizeof (*dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->hw_path = id;
dev->id.hw_type = HPHW_FAULTY;
dev->dev.parent = parent;
setup_bus_id(dev);
dev->dev.bus = &parisc_bus_type;
dev->dma_mask = 0 xffffffffUL; /* PARISC devices are 32-bit */
/* make the generic dma mask a pointer to the parisc one */
dev->dev.dma_mask = &dev->dma_mask;
dev->dev.coherent_dma_mask = dev->dma_mask;
if (device_register(&dev->dev)) {
kfree(dev);
return NULL;
}
return dev;
}
struct match_id_data {
char id;
struct parisc_device * dev;
};
static int match_by_id(struct device * dev, void * data)
{
struct parisc_device * pdev = to_parisc_device(dev);
struct match_id_data * d = data;
if (pdev->hw_path == d->id) {
d->dev = pdev;
return 1 ;
}
return 0 ;
}
/**
* alloc_tree_node - returns a device entry in the iotree
* @ parent : the parent node in the tree
* @ id : the element of the module path for this entry
*
* Checks all the children of @ parent for a matching @ id . If none
* found , it allocates a new device and returns it .
*/
static struct parisc_device * __init alloc_tree_node(
struct device *parent, char id)
{
struct match_id_data d = {
.id = id,
};
if (device_for_each_child(parent, &d, match_by_id))
return d.dev;
else
return create_tree_node(id, parent);
}
static struct parisc_device *create_parisc_device(struct hardware_path *modpath)
{
int i;
struct device *parent = &root;
for (i = 0 ; i < 6 ; i++) {
if (modpath->bc[i] == -1 )
continue ;
parent = &alloc_tree_node(parent, modpath->bc[i])->dev;
}
return alloc_tree_node(parent, modpath->mod);
}
struct parisc_device * __init
alloc_pa_dev(unsigned long hpa, struct hardware_path *mod_path)
{
int status;
unsigned long bytecnt;
u8 iodc_data[32 ];
struct parisc_device *dev;
const char *name;
/* Check to make sure this device has not already been added - Ryan */
if (find_device_by_addr(hpa) != NULL)
return NULL;
status = pdc_iodc_read(&bytecnt, hpa, 0 , &iodc_data, 32 );
if (status != PDC_OK)
return NULL;
dev = create_parisc_device(mod_path);
if (dev->id.hw_type != HPHW_FAULTY) {
pr_err("Two devices have hardware path [%s]. IODC data for second device: %7phN\n"
"Rearranging GSC cards sometimes helps\n" ,
parisc_pathname(dev), iodc_data);
return NULL;
}
dev->id.hw_type = iodc_data[3 ] & 0 x1f;
dev->id.hversion = (iodc_data[0 ] << 4 ) | ((iodc_data[1 ] & 0 xf0) >> 4 );
dev->id.hversion_rev = iodc_data[1 ] & 0 x0f;
dev->id.sversion = ((iodc_data[4 ] & 0 x0f) << 16 ) |
(iodc_data[5 ] << 8 ) | iodc_data[6 ];
dev->hpa.start = hpa;
/* This is awkward. The STI spec says that gfx devices may occupy
* 32 MB or 64 MB . Unfortunately , we don ' t know how to tell whether
* it ' s the former or the latter . Assumptions either way can hurt us .
*/
if (hpa == 0 xf4000000 || hpa == 0 xf8000000) {
dev->hpa.end = hpa + 0 x03ffffff;
} else if (hpa == 0 xf6000000 || hpa == 0 xfa000000) {
dev->hpa.end = hpa + 0 x01ffffff;
} else {
dev->hpa.end = hpa + 0 xfff;
}
dev->hpa.flags = IORESOURCE_MEM;
dev->hpa.name = dev->name;
name = parisc_hardware_description(&dev->id) ? : "unknown" ;
snprintf(dev->name, sizeof (dev->name), "%s [%s]" ,
name, parisc_pathname(dev));
/* Silently fail things like mouse ports which are subsumed within
* the keyboard controller
*/
if ((hpa & 0 xfff) == 0 && insert_resource(&iomem_resource, &dev->hpa))
pr_warn("Unable to claim HPA %lx for device %s\n" , hpa, name);
return dev;
}
static int parisc_generic_match(struct device *dev, const struct device_driver *drv)
{
return match_device(to_parisc_driver(drv), to_parisc_device(dev));
}
static ssize_t make_modalias(const struct device *dev, char *buf)
{
const struct parisc_device *padev = to_parisc_device(dev);
const struct parisc_device_id *id = &padev->id;
return sprintf(buf, "parisc:t%02Xhv%04Xrev%02Xsv%08X\n" ,
(u8)id->hw_type, (u16)id->hversion, (u8)id->hversion_rev,
(u32)id->sversion);
}
static int parisc_uevent(const struct device *dev, struct kobj_uevent_env *env)
{
const struct parisc_device *padev;
char modalias[40 ];
if (!dev)
return -ENODEV;
padev = to_parisc_device(dev);
if (!padev)
return -ENODEV;
if (add_uevent_var(env, "PARISC_NAME=%s" , padev->name))
return -ENOMEM;
make_modalias(dev, modalias);
if (add_uevent_var(env, "MODALIAS=%s" , modalias))
return -ENOMEM;
return 0 ;
}
#define pa_dev_attr(name, field, format_string) \
static ssize_t name## _show(struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct parisc_device *padev = to_parisc_device(dev); \
return sprintf(buf, format_string, padev->field); \
} \
static DEVICE_ATTR_RO(name);
#define pa_dev_attr_id(field, format) pa_dev_attr(field, id.field, format)
pa_dev_attr(irq, irq, "%u\n" );
pa_dev_attr_id(hw_type, "0x%02x\n" );
pa_dev_attr(rev, id.hversion_rev, "0x%x\n" );
pa_dev_attr_id(hversion, "0x%03x\n" );
pa_dev_attr_id(sversion, "0x%05x\n" );
static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf)
{
return make_modalias(dev, buf);
}
static DEVICE_ATTR_RO(modalias);
static struct attribute *parisc_device_attrs[] = {
&dev_attr_irq.attr,
&dev_attr_hw_type.attr,
&dev_attr_rev.attr,
&dev_attr_hversion.attr,
&dev_attr_sversion.attr,
&dev_attr_modalias.attr,
NULL,
};
ATTRIBUTE_GROUPS(parisc_device);
const struct bus_type parisc_bus_type = {
.name = "parisc" ,
.match = parisc_generic_match,
.uevent = parisc_uevent,
.dev_groups = parisc_device_groups,
.probe = parisc_driver_probe,
.remove = __exit_p(parisc_driver_remove),
};
/**
* register_parisc_device - Locate a driver to manage this device .
* @ dev : The parisc device .
*
* Search the driver list for a driver that is willing to manage
* this device .
*/
int __init register_parisc_device(struct parisc_device *dev)
{
if (!dev)
return 0 ;
if (dev->driver)
return 1 ;
return 0 ;
}
/**
* match_pci_device - Matches a pci device against a given hardware path
* entry .
* @ dev : the generic device ( known to be contained by a pci_dev ) .
* @ index : the current BC index
* @ modpath : the hardware path .
* @ return : true if the device matches the hardware path .
*/
static int match_pci_device(struct device *dev, int index,
struct hardware_path *modpath)
{
struct pci_dev *pdev = to_pci_dev(dev);
int id;
if (index == 5 ) {
/* we are at the end of the path, and on the actual device */
unsigned int devfn = pdev->devfn;
return ((modpath->bc[5 ] == PCI_SLOT(devfn)) &&
(modpath->mod == PCI_FUNC(devfn)));
}
/* index might be out of bounds for bc[] */
if (index >= 6 )
return 0 ;
id = PCI_SLOT(pdev->devfn) | (PCI_FUNC(pdev->devfn) << 5 );
return (modpath->bc[index] == id);
}
/**
* match_parisc_device - Matches a parisc device against a given hardware
* path entry .
* @ dev : the generic device ( known to be contained by a parisc_device ) .
* @ index : the current BC index
* @ modpath : the hardware path .
* @ return : true if the device matches the hardware path .
*/
static int match_parisc_device(struct device *dev, int index,
struct hardware_path *modpath)
{
struct parisc_device *curr = to_parisc_device(dev);
char id = (index == 6 ) ? modpath->mod : modpath->bc[index];
return (curr->hw_path == id);
}
struct parse_tree_data {
int index;
struct hardware_path * modpath;
struct device * dev;
};
static int check_parent(struct device * dev, void * data)
{
struct parse_tree_data * d = data;
if (check_dev(dev)) {
if (dev->bus == &parisc_bus_type) {
if (match_parisc_device(dev, d->index, d->modpath))
d->dev = dev;
} else if (dev_is_pci(dev)) {
if (match_pci_device(dev, d->index, d->modpath))
d->dev = dev;
} else if (dev->bus == NULL) {
/* we are on a bus bridge */
struct device *new = parse_tree_node(dev, d->index, d->modpath);
if (new )
d->dev = new ;
}
}
return d->dev != NULL;
}
/**
* parse_tree_node - returns a device entry in the iotree
* @ parent : the parent node in the tree
* @ index : the current BC index
* @ modpath : the hardware_path struct to match a device against
* @ return : The corresponding device if found , NULL otherwise .
*
* Checks all the children of @ parent for a matching @ id . If none
* found , it returns NULL .
*/
static struct device *
parse_tree_node(struct device *parent, int index, struct hardware_path *modpath)
{
struct parse_tree_data d = {
.index = index,
.modpath = modpath,
};
struct recurse_struct recurse_data = {
.obj = &d,
.fn = check_parent,
};
if (device_for_each_child(parent, &recurse_data, descend_children))
{ /* nothing */ }
return d.dev;
}
/**
* hwpath_to_device - Finds the generic device corresponding to a given hardware path .
* @ modpath : the hardware path .
* @ return : The target device , NULL if not found .
*/
struct device *hwpath_to_device(struct hardware_path *modpath)
{
int i;
struct device *parent = &root;
for (i = 0 ; i < 6 ; i++) {
if (modpath->bc[i] == -1 )
continue ;
parent = parse_tree_node(parent, i, modpath);
if (!parent)
return NULL;
}
if (dev_is_pci(parent)) /* pci devices already parse MOD */
return parent;
else
return parse_tree_node(parent, 6 , modpath);
}
EXPORT_SYMBOL(hwpath_to_device);
/**
* device_to_hwpath - Populates the hwpath corresponding to the given device .
* @ dev : the target device
* @ path : pointer to a previously allocated hwpath struct to be filled in
*/
void device_to_hwpath(struct device *dev, struct hardware_path *path)
{
struct parisc_device *padev;
if (dev->bus == &parisc_bus_type) {
padev = to_parisc_device(dev);
get_node_path(dev->parent, path);
path->mod = padev->hw_path;
} else if (dev_is_pci(dev)) {
get_node_path(dev, path);
}
}
EXPORT_SYMBOL(device_to_hwpath);
#define BC_PORT_MASK 0 x8
#define BC_LOWER_PORT 0 x8
#define BUS_CONVERTER(dev) \
((dev->id.hw_type == HPHW_IOA) || (dev->id.hw_type == HPHW_BCPORT))
#define IS_LOWER_PORT(dev) \
((gsc_readl(dev->hpa.start + offsetof(struct bc_module, io_status)) \
& BC_PORT_MASK) == BC_LOWER_PORT)
#define MAX_NATIVE_DEVICES 64
#define NATIVE_DEVICE_OFFSET 0 x1000
#define FLEX_MASK F_EXTEND(0 xfffc0000)
#define IO_IO_LOW offsetof(struct bc_module, io_io_low)
#define IO_IO_HIGH offsetof(struct bc_module, io_io_high)
#define READ_IO_IO_LOW(dev) (unsigned long )(signed int )gsc_readl(dev->hpa.start + IO_IO_LOW)
#define READ_IO_IO_HIGH(dev) (unsigned long )(signed int )gsc_readl(dev->hpa.start + IO_IO_HIGH)
static void walk_native_bus(unsigned long io_io_low, unsigned long io_io_high,
struct device *parent);
static void __init walk_lower_bus(struct parisc_device *dev)
{
unsigned long io_io_low, io_io_high;
if (!BUS_CONVERTER(dev) || IS_LOWER_PORT(dev))
return ;
if (dev->id.hw_type == HPHW_IOA) {
io_io_low = (unsigned long )(signed int )(READ_IO_IO_LOW(dev) << 16 );
io_io_high = io_io_low + MAX_NATIVE_DEVICES * NATIVE_DEVICE_OFFSET;
} else {
io_io_low = (READ_IO_IO_LOW(dev) + ~FLEX_MASK) & FLEX_MASK;
io_io_high = (READ_IO_IO_HIGH(dev)+ ~FLEX_MASK) & FLEX_MASK;
}
walk_native_bus(io_io_low, io_io_high, &dev->dev);
}
/**
* walk_native_bus - - Probe a bus for devices
* @ io_io_low : Base address of this bus .
* @ io_io_high : Last address of this bus .
* @ parent : The parent bus device .
*
* A native bus ( eg Runway or GSC ) may have up to 64 devices on it ,
* spaced at intervals of 0 x1000 bytes . PDC may not inform us of these
* devices , so we have to probe for them . Unfortunately , we may find
* devices which are not physically connected ( such as extra serial &
* keyboard ports ) . This problem is not yet solved .
*/
static void __init walk_native_bus(unsigned long io_io_low,
unsigned long io_io_high, struct device *parent)
{
int i, devices_found = 0 ;
unsigned long hpa = io_io_low;
struct hardware_path path;
get_node_path(parent, &path);
do {
for (i = 0 ; i < MAX_NATIVE_DEVICES; i++, hpa += NATIVE_DEVICE_OFFSET) {
struct parisc_device *dev;
/* Was the device already added by Firmware? */
dev = find_device_by_addr(hpa);
if (!dev) {
path.mod = i;
dev = alloc_pa_dev(hpa, &path);
if (!dev)
continue ;
register_parisc_device(dev);
devices_found++;
}
walk_lower_bus(dev);
}
} while (!devices_found && hpa < io_io_high);
}
#define CENTRAL_BUS_ADDR F_EXTEND(0 xfff80000)
/**
* walk_central_bus - Find devices attached to the central bus
*
* PDC doesn ' t tell us about all devices in the system . This routine
* finds devices connected to the central bus .
*/
void __init walk_central_bus(void )
{
walk_native_bus(CENTRAL_BUS_ADDR,
CENTRAL_BUS_ADDR + (MAX_NATIVE_DEVICES * NATIVE_DEVICE_OFFSET),
&root);
}
static __init void print_parisc_device(struct parisc_device *dev)
{
static int count __initdata;
pr_info("%d. %s at %pap { type:%d, hv:%#x, sv:%#x, rev:%#x }" ,
++count, dev->name, &(dev->hpa.start), dev->id.hw_type,
dev->id.hversion, dev->id.sversion, dev->id.hversion_rev);
if (dev->num_addrs) {
int k;
pr_cont(", additional addresses: " );
for (k = 0 ; k < dev->num_addrs; k++)
pr_cont("0x%lx " , dev->addr[k]);
}
pr_cont("\n" );
}
/**
* init_parisc_bus - Some preparation to be done before inventory
*/
void __init init_parisc_bus(void )
{
if (bus_register(&parisc_bus_type))
panic("Could not register PA-RISC bus type\n" );
if (device_register(&root))
panic("Could not register PA-RISC root device\n" );
get_device(&root);
}
static __init void qemu_header(void )
{
int num;
unsigned long *p;
pr_info("--- cut here ---\n" );
pr_info("/* AUTO-GENERATED HEADER FILE FOR SEABIOS FIRMWARE */\n");
pr_cont("/* generated with Linux kernel */\n");
pr_cont("/* search for PARISC_QEMU_MACHINE_HEADER in Linux */\n\n");
pr_info("#define PARISC_MODEL \" %s\"\n\n" ,
boot_cpu_data.pdc.sys_model_name);
#define p ((unsigned long *)&boot_cpu_data.pdc.model)
pr_info("#define PARISC_PDC_MODEL 0x%lx, 0x%lx, 0x%lx, "
"0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx, 0x%lx\n\n" ,
p[0 ], p[1 ], p[2 ], p[3 ], p[4 ], p[5 ], p[6 ], p[7 ], p[8 ], p[9 ]);
#undef p
pr_info("#define PARISC_PDC_VERSION 0x%04lx\n\n" ,
boot_cpu_data.pdc.versions);
pr_info("#define PARISC_PDC_CPUID 0x%04lx\n\n" ,
boot_cpu_data.pdc.cpuid);
pr_info("#define PARISC_PDC_CAPABILITIES 0x%04lx\n\n" ,
boot_cpu_data.pdc.capabilities);
pr_info("#define PARISC_PDC_ENTRY_ORG 0x%04lx\n\n" ,
#ifdef CONFIG_64BIT
(unsigned long )(PAGE0->mem_pdc_hi) << 32 |
#endif
(unsigned long )PAGE0->mem_pdc);
pr_info("#define PARISC_PDC_CACHE_INFO" );
p = (unsigned long *) &cache_info;
for (num = 0 ; num < sizeof (cache_info); num += sizeof (unsigned long )) {
if (((num % 5 ) == 0 )) {
pr_cont(" \\\n" );
pr_info("\t" );
}
pr_cont("%s0x%04lx" ,
num?", " :"" , *p++);
}
pr_cont("\n\n" );
}
static __init int qemu_print_hpa(struct device *lin_dev, void *data)
{
struct parisc_device *dev = to_parisc_device(lin_dev);
unsigned long hpa = dev->hpa.start;
pr_cont("\t{\t.hpa = 0x%08lx,\\\n" , hpa);
pr_cont("\t\t.iodc = &iodc_data_hpa_%08lx,\\\n" , hpa);
pr_cont("\t\t.mod_info = &mod_info_hpa_%08lx,\\\n" , hpa);
pr_cont("\t\t.mod_path = &mod_path_hpa_%08lx,\\\n" , hpa);
pr_cont("\t\t.num_addr = HPA_%08lx_num_addr,\\\n" , hpa);
pr_cont("\t\t.add_addr = { HPA_%08lx_add_addr } },\\\n" , hpa);
return 0 ;
}
static __init void qemu_footer(void )
{
pr_info("\n\n#define PARISC_DEVICE_LIST \\\n" );
for_each_padev(qemu_print_hpa, NULL);
pr_cont("\t{ 0, }\n" );
pr_info("--- cut here ---\n" );
}
/* print iodc data of the various hpa modules for qemu inclusion */
static __init int qemu_print_iodc_data(struct device *lin_dev, void *data)
{
struct parisc_device *dev = to_parisc_device(lin_dev);
unsigned long count;
unsigned long hpa = dev->hpa.start;
int status;
struct pdc_iodc iodc_data;
int mod_index;
struct pdc_system_map_mod_info pdc_mod_info;
struct pdc_module_path mod_path;
status = pdc_iodc_read(&count, hpa, 0 ,
&iodc_data, sizeof (iodc_data));
if (status != PDC_OK) {
pr_info("No IODC data for hpa 0x%08lx\n" , hpa);
return 0 ;
}
pr_info("\n" );
/* Prevent hung task messages when printing on serial console */
cond_resched();
pr_info("#define HPA_%08lx_DESCRIPTION \" %s\"\n" ,
hpa, parisc_hardware_description(&dev->id));
mod_index = 0 ;
do {
status = pdc_system_map_find_mods(&pdc_mod_info,
&mod_path, mod_index++);
} while (status == PDC_OK && pdc_mod_info.mod_addr != hpa);
pr_info("static struct pdc_system_map_mod_info"
" mod_info_hpa_%08lx = {\n" , hpa);
#define DO (member) \
pr_cont("\t." #member " = 0x%x,\n" , \
(unsigned int )pdc_mod_info.member)
DO (mod_addr);
DO (mod_pgs);
DO (add_addrs);
pr_cont("};\n" );
#undef DO
pr_info("static struct pdc_module_path "
"mod_path_hpa_%08lx = {\n" , hpa);
pr_cont("\t.path = { " );
pr_cont(".flags = 0x%x, " , mod_path.path.flags);
pr_cont(".bc = { 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x }, " ,
(unsigned char )mod_path.path.bc[0 ],
(unsigned char )mod_path.path.bc[1 ],
(unsigned char )mod_path.path.bc[2 ],
(unsigned char )mod_path.path.bc[3 ],
(unsigned char )mod_path.path.bc[4 ],
(unsigned char )mod_path.path.bc[5 ]);
pr_cont(".mod = 0x%x " , mod_path.path.mod);
pr_cont(" },\n" );
pr_cont("\t.layers = { 0x%x, 0x%x, 0x%x, 0x%x, 0x%x, 0x%x }\n" ,
mod_path.layers[0 ], mod_path.layers[1 ], mod_path.layers[2 ],
mod_path.layers[3 ], mod_path.layers[4 ], mod_path.layers[5 ]);
pr_cont("};\n" );
pr_info("static struct pdc_iodc iodc_data_hpa_%08lx = {\n" , hpa);
#define DO (member) \
pr_cont("\t." #member " = 0x%04lx,\n" , \
(unsigned long )iodc_data.member)
DO (hversion_model);
DO (hversion);
DO (spa);
DO (type);
DO (sversion_rev);
DO (sversion_model);
DO (sversion_opt);
DO (rev);
DO (dep);
DO (features);
DO (checksum);
DO (length);
#undef DO
pr_cont("\t/* pad: 0x%04x, 0x%04x */\n",
iodc_data.pad[0 ], iodc_data.pad[1 ]);
pr_cont("};\n" );
pr_info("#define HPA_%08lx_num_addr %d\n" , hpa, dev->num_addrs);
pr_info("#define HPA_%08lx_add_addr " , hpa);
count = 0 ;
if (dev->num_addrs == 0 )
pr_cont("0" );
while (count < dev->num_addrs) {
pr_cont("0x%08lx, " , dev->addr[count]);
count++;
}
pr_cont("\n\n" );
return 0 ;
}
static __init int print_one_device(struct device * dev, void * data)
{
struct parisc_device * pdev = to_parisc_device(dev);
if (check_dev(dev))
print_parisc_device(pdev);
return 0 ;
}
/**
* print_parisc_devices - Print out a list of devices found in this system
*/
void __init print_parisc_devices(void )
{
for_each_padev(print_one_device, NULL);
#define PARISC_QEMU_MACHINE_HEADER 0
if (PARISC_QEMU_MACHINE_HEADER) {
qemu_header();
for_each_padev(qemu_print_iodc_data, NULL);
qemu_footer();
}
}
Messung V0.5 in Prozent C=97 H=90 G=93
¤ Dauer der Verarbeitung: 0.19 Sekunden
(vorverarbeitet am 2026-09-29)
¤
*© Formatika GbR, Deutschland