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implemented pci_find_classcode()

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This commit is contained in:
Markus Fröschle
2013-12-30 09:58:14 +00:00
parent 5f9da1e6e9
commit 33a774d1cf
2 changed files with 89 additions and 8 deletions
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19
BaS_gcc/include/pci.h
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@@ -191,16 +191,16 @@ typedef struct /* structure of address conversion */
#define PCI_COMMAND(i) (((i) >> 16) & 0xffff) #define PCI_COMMAND(i) (((i) >> 16) & 0xffff)
/* register 0x08 macros */ /* register 0x08 macros */
#define PCI_CLASS_CODE(i) ((swpl((i)) & 0xffff0000) >> 16) #define PCI_CLASS_CODE(i) ((swpl((i)) & 0xff000000) >> 24)
#define PCI_SUBCLASS(i) ((swpl((i)) & 0xffffff00) >> 8) #define PCI_SUBCLASS(i) ((swpl((i)) & 0x00ff0000) >> 16)
#define PCI_PROF_IF(i) (((i) & 0xff00) >> 8) #define PCI_PROG_IF(i) ((swpl((i)) & 0x0000ff00) >> 8)
#define PCI_REVISION_ID(i) (((i) & 0xff)) #define PCI_REVISION_ID(i) ((swpl((i)) & 0x000000ff))
/* register 0x0c macros */ /* register 0x0c macros */
#define PCI_BIST(i) (((i) & 0xff000000) >> 24) #define PCI_BIST(i) ((swpl((i)) & 0xff000000) >> 24)
#define PCI_HEADER_TYPE(i) (((i) & 0xff0000) >> 16) #define PCI_HEADER_TYPE(i) ((swpl((i)) & 0x00ff0000) >> 16)
#define PCI_LAT_TIMER(i) (((i) & 0xff00) >> 8) #define PCI_LAT_TIMER(i) ((swpl((i)) & 0x0000ff00) >> 8)
#define PCI_CACHELINE_SIZE(i) (((i) & 0xff)) #define PCI_CACHELINE_SIZE(i) ((swpl((i)) & 0x000000ff))
/* register 0x2c macros */ /* register 0x2c macros */
#define PCI_SUBSYS_ID(i) (((i) & 0xffff0000) >> 16) #define PCI_SUBSYS_ID(i) (((i) & 0xffff0000) >> 16)
@@ -220,11 +220,14 @@ typedef struct /* structure of address conversion */
#define PCI_MEMBAR_TYPE(i) (((i) & 0x6) >> 1) #define PCI_MEMBAR_TYPE(i) (((i) & 0x6) >> 1)
#define PCI_IOBAR_ADR(i) (((i) & 0xfffffffc)) #define PCI_IOBAR_ADR(i) (((i) & 0xfffffffc))
#define PCI_MEMBAR_ADR(i) (((i) & 0xfffffff0)) #define PCI_MEMBAR_ADR(i) (((i) & 0xfffffff0))
extern void init_eport(void); extern void init_eport(void);
extern void init_xlbus_arbiter(void); extern void init_xlbus_arbiter(void);
extern void init_pci(void); extern void init_pci(void);
extern int32_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index); extern int32_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index);
extern int32_t pci_find_classcode(uint32_t classcode, int index);
extern uint32_t pci_read_config_longword(int32_t handle, int offset); extern uint32_t pci_read_config_longword(int32_t handle, int offset);
extern uint16_t pci_read_config_word(int32_t handle, int offset); extern uint16_t pci_read_config_word(int32_t handle, int offset);

78
BaS_gcc/pci/pci.c
View File

@@ -498,6 +498,84 @@ int32_t pci_find_device(uint16_t device_id, uint16_t vendor_id, int index)
return PCI_DEVICE_NOT_FOUND; return PCI_DEVICE_NOT_FOUND;
} }
/*
* pci_find_classcode(uint32_t classcode, int index)
*
* Find the index'th pci device with a specific classcode. Bits 0-23 describe this classcode.
* Bits 24 - 26 describe what needs to match: 24: prog interface, 25: PCI subclass, 26: PCI base class.
* If no bits are set, there is a match for each device.
*/
int32_t pci_find_classcode(uint32_t classcode, int index)
{
uint16_t bus;
uint16_t device;
uint16_t function = 0;
uint16_t n = 0;
int32_t handle;
for (bus = 0; bus < 2; bus++)
{
for (device = 10; device < 31; device++)
{
uint32_t value;
uint8_t htr;
handle = PCI_HANDLE(bus, device, 0);
value = pci_read_config_longword(handle, PCIIDR);
if (value != 0xffffffff) /* device found */
{
value = pci_read_config_longword(handle, PCICCR);
if ((classcode & (1 << 26) ? ((PCI_CLASS_CODE(value) == (classcode & 0xff))) : true) &&
(classcode & (1 << 25) ? ((PCI_SUBCLASS(value) == ((classcode & 0xff00) >> 8))) : true) &&
(classcode & (1 << 24) ? ((PCI_PROG_IF(value) == ((classcode & 0xff0000) >> 16))) : true))
{
if (n == index)
{
return handle;
}
n++;
}
/*
* there is a device at this position, but not the one we are looking for.
* Check to see if it is a multi-function device. We need to look "behind" it
* for the other functions in that case.
*/
if ((htr = pci_read_config_byte(handle, PCIHTR)) & 0x80)
{
/* yes, this is a multi-function device, look for more functions */
for (function = 1; function < 8; function++)
{
handle = PCI_HANDLE(bus, device, function);
value = pci_read_config_longword(handle, PCIIDR);
if (value != 0xffffffff) /* device found */
{
value = pci_read_config_longword(handle, PCICCR);
if ((classcode & (1 << 26) ? ((PCI_CLASS_CODE(value) == (classcode & 0xff))) : true) &&
(classcode & (1 << 25) ? ((PCI_SUBCLASS(value) == ((classcode & 0xff00) >> 8))) : true) &&
(classcode & (1 << 24) ? ((PCI_PROG_IF(value) == ((classcode & 0xff0000) >> 16))) : true))
{
if (n == index)
{
return handle;
}
n++;
}
}
}
}
}
}
}
return PCI_DEVICE_NOT_FOUND;
}
int32_t pci_hook_interrupt(int32_t handle, void *handler, void *parameter) int32_t pci_hook_interrupt(int32_t handle, void *handler, void *parameter)
{ {
/* FIXME: implement */ /* FIXME: implement */