prep_pci.c File Reference

#include <freeldr.h>
#include "prep.h"

Include dependency graph for prep_pci.c:

Go to the source code of this file.

Classes
struct	_pci_cfg
struct	_pci_desc

Macros
#define	rev16(x)   ((((x)>>8)&0xff)|(((x)&0xff)<<8))
#define	rev32(x)   ((((x)>>24)&0xff)|(((x)>>8)&0xff00)|(((x)&0xff00)<<8)|(((x)&0xff)<<24))
#define	pci_addr(bus, dev, fn, reg)
#define	pci_cfg_addr(bus, dev, fn, reg)   pci_addr(bus,dev,fn,reg)
#define	PCI_VENDORID   0
#define	PCI_DEVICEID   2
#define	PCI_HEADER_TYPE   0xe
#define	PCI_BASECLASS   0xb

Typedefs
typedef struct _pci_cfg	pci_cfg
typedef struct _pci_desc	pci_desc

Functions
unsigned long	pci_read (pci_desc *desc, int bus, int dev, int fn, int reg, int len)
void	pci_read_bar (pci_desc *desc, int bus, int dev, int fn, int bar, struct _pci_bar *bar_data)
void	pci_write (pci_desc *desc, int bus, int dev, int fn, int reg, int len, int val)
void	pci_write_bar (pci_desc *desc, int bus, int dev, int fn, int bar, struct _pci_bar *bar_data)
void	print_bar (struct _pci_bar *bar)
void	pci_setup (PCONFIGURATION_COMPONENT_DATA pcibus, pci_desc *desc)

Variables
pci_desc	pci1_desc = { (void *)0x80000cf8 }

Macro Definition Documentation

pci_addr

#define pci_addr	(		bus,
			dev,
			fn,
			reg
	)

Value:

(0x80000000 | \
          ((bus & 0xff) << 16) | \
          ((dev & 0x1f) << 11) | \
          ((fn & 7) << 8) | \
          (reg & 0xfc))

Definition at line 16 of file prep_pci.c.

PCI_BASECLASS

#define PCI_BASECLASS   0xb

Definition at line 94 of file prep_pci.c.

pci_cfg_addr

#define pci_cfg_addr	(		bus,
			dev,
			fn,
			reg
	)		pci_addr(bus,dev,fn,reg)

Definition at line 30 of file prep_pci.c.

PCI_DEVICEID

#define PCI_DEVICEID   2

Definition at line 92 of file prep_pci.c.

PCI_HEADER_TYPE

#define PCI_HEADER_TYPE   0xe

Definition at line 93 of file prep_pci.c.

PCI_VENDORID

#define PCI_VENDORID   0

Definition at line 91 of file prep_pci.c.

rev16

#define rev16

(

x

)

((((x)>>8)&0xff)|(((x)&0xff)<<8))

Definition at line 14 of file prep_pci.c.

rev32

#define rev32

(

x

)

((((x)>>24)&0xff)|(((x)>>8)&0xff00)|(((x)&0xff00)<<8)|(((x)&0xff)<<24))

Definition at line 15 of file prep_pci.c.

Typedef Documentation

pci_cfg

typedef struct _pci_cfg pci_cfg

pci_desc

typedef struct _pci_desc pci_desc

Function Documentation

pci_read()

unsigned long pci_read	(	pci_desc *	desc,
		int	bus,
		int	dev,
		int	fn,
		int	reg,
		int	len
	)

Definition at line 32 of file prep_pci.c.

                                                                                         {
    sync();
    unsigned long save_state = desc->cfg->addr, ret = 0;
    unsigned long addr = pci_cfg_addr(bus,dev,fn,reg);
    unsigned long offset = reg & 3;
    desc->cfg->addr = rev32(addr);
    sync();
    switch( len ) {
    case 4:
        ret = desc->cfg->data;
        break;
    case 2:
        ret = desc->cfg->data;
        ret = (ret >> (offset << 3)) & 0xffff;
        break;
    case 1:
        ret = desc->cfg->data;
        ret = (ret >> (offset << 3)) & 0xff;
        break;
    }
    desc->cfg->addr = save_state;
    sync();
    return ret;
    }

Referenced by pci_read_bar(), pci_setup(), and pci_write().

pci_read_bar()

void pci_read_bar	(	pci_desc *	desc,
		int	bus,
		int	dev,
		int	fn,
		int	bar,
		struct _pci_bar *	bar_data
	)

Definition at line 57 of file prep_pci.c.

                                       {
    bar_data->data = pci_read( desc, bus, dev, fn, 0x10 + (bar * 4), 4 );
}

Referenced by vga_setup().

pci_setup()

void pci_setup	(	PCONFIGURATION_COMPONENT_DATA	pcibus,
		pci_desc *	desc
	)

Definition at line 96 of file prep_pci.c.

                                                                       {
    unsigned char type;
    unsigned short vendor, device, devclass;
    int funcs, bus, dev, fn;

    pci1_desc.cfg = (pci_cfg *)0x80000cf8;

    printf("PCI Bus:\n");
    for( bus = 0; bus < 1; bus++ ) {
        for( dev = 0; dev < 32; dev++ ) {
            type = pci_read(desc,bus,dev,0,PCI_HEADER_TYPE,1);
            vendor = pci_read(desc,bus,dev,0,PCI_VENDORID,2);
            device = pci_read(desc,bus,dev,0,PCI_DEVICEID,2);

            if(vendor == 0 || vendor == 0xffff) continue;
            if(type & 0x80) funcs = 8; else funcs = 1;

            for( fn = 0; fn < funcs; fn++ ) {
                devclass = pci_read(desc,bus,dev,fn,PCI_BASECLASS,1);
        printf(" %d:%d -> vendor:device:class %x:%x:%x\n",
               bus, dev, vendor, device, devclass);

                if( devclass == 3 ) {
            printf("Setting up vga...\n");
                    vga_setup(pcibus,desc,&vga1_desc,bus,dev,fn);
            printf("Done with vga\n");
                }
            }
        }
    }
    printf("^-- end PCI\n");
}

pci_write()

void pci_write	(	pci_desc *	desc,
		int	bus,
		int	dev,
		int	fn,
		int	reg,
		int	len,
		int	val
	)

Definition at line 68 of file prep_pci.c.

                                                                                      {
    unsigned long save_state = desc->cfg->addr;
    unsigned long addr = pci_cfg_addr(bus,dev,fn,reg);
    unsigned long offset = reg & 3;
    unsigned long oldval = pci_read( desc, bus, dev, fn, reg & ~3, 4 );
    unsigned long mask = ((1 << (len * 8)) - 1) << (offset << 3);
    oldval = (oldval & ~mask) | ((val << (offset << 3)) & mask);
    desc->cfg->addr = rev32(addr);
    sync();
    desc->cfg->data = rev32(oldval);
    sync();
    desc->cfg->addr = save_state;
    sync();
}

Referenced by pci_write_bar().

pci_write_bar()

void pci_write_bar	(	pci_desc *	desc,
		int	bus,
		int	dev,
		int	fn,
		int	bar,
		struct _pci_bar *	bar_data
	)

Definition at line 83 of file prep_pci.c.

                                                                                                   {
    pci_write( desc, bus, dev, fn, 0x10 + (bar * 4), 4, bar_data->data );
}

print_bar()

void print_bar

(

struct _pci_bar *

bar

)

Definition at line 87 of file prep_pci.c.

                                       {
    printf("BAR: %x\n", bar->data);
}

Referenced by vga_setup().

Variable Documentation

pci1_desc

pci_desc pci1_desc = { (void *)0x80000cf8 }

Definition at line 13 of file prep_pci.c.

Referenced by pci_setup().