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x86: Add PCI support

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This patch adds the pci.c and pci.h files, which support access to PCI
configuration registers through a function interface.  It defines the
PCI configuration register access I/O port addresses and the
pci_config_addr union and structure to assist in specifying addresses
of PCI configuration registers.  It also defines the PCI configuration
register identifier for PCI BAR0.

This patch also adds wrappers for 32-bit 'in' and 'out' port I/O
instructions.  They were placed in helpers.S, since they may be useful
to other modules besides just the PCI support module.
This commit is contained in:
Michael LeMay 2015-07-03 00:27:11 -07:00 • committed by Jesus Sanchez-Palencia
parent 62fc195d0f
commit 2dccb55e15
5 changed files with 143 additions and 7 deletions
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11
cpu/x86/helpers.h
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@ -37,13 +37,12 @@
void halt(void) __attribute__((__noreturn__));
/**
* Wrapper for the assembly 'out' instruction.
*
*/
void outb(uint16_t port, uint8_t byte);
/** Wrappers for the assembly 'out' instruction. */
void outb(uint16_t port, uint8_t val);
void outl(uint16_t port, uint32_t val);
/* Wrapper for the assembly 'in' instruction */
/** Wrappers for the assembly 'in' instruction */
uint8_t inb(uint16_t port);
uint32_t inl(uint16_t port);
#endif /* HELPERS_H */