mirror of
https://codeberg.org/canoeboot/cbmk.git
synced 2024-12-22 07:49:55 +00:00
151 lines
2.9 KiB
C
151 lines
2.9 KiB
C
/* SPDX-License-Identifier: MIT */
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/* SPDX-FileCopyrightText: 2023 Nicholas Chin */
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#if defined(__linux__)
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#include <sys/io.h>
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#endif
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#if defined(__OpenBSD__) || defined(__NetBSD__)
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#include <sys/types.h>
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#include <machine/sysarch.h>
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#endif /* __OpenBSD__ || __NetBSD__ */
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#if defined(__OpenBSD__)
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#if defined(__amd64__)
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#include <amd64/pio.h>
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#elif defined(__i386__)
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#include <i386/pio.h>
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#endif /* __i386__ */
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#endif /* __OpenBSD__ */
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#if defined(__FreeBSD__)
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#include <fcntl.h>
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#include <sys/types.h>
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#include <machine/cpufunc.h>
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#include <unistd.h>
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#endif /* __FreeBSD__ */
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#include <errno.h>
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#include "accessors.h"
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uint32_t
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pci_read_32(uint32_t dev, uint8_t reg)
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{
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sys_outl(PCI_CFG_ADDR, dev | reg);
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return sys_inl(PCI_CFG_DATA);
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}
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void
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pci_write_32(uint32_t dev, uint8_t reg, uint32_t value)
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{
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sys_outl(PCI_CFG_ADDR, dev | reg);
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sys_outl(PCI_CFG_DATA, value);
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}
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void
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sys_outb(unsigned int port, uint8_t data)
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{
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#if defined(__linux__)
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outb(data, port);
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#endif
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#if defined(__OpenBSD__) || defined(__FreeBSD__)
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outb(port, data);
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#endif
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#if defined(__NetBSD__)
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__asm__ volatile ("outb %b0, %w1" : : "a"(data), "d"(port));
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#endif
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}
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void
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sys_outl(unsigned int port, uint32_t data)
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{
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#if defined(__linux__)
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outl(data, port);
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#endif
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#if defined(__OpenBSD__) || defined(__FreeBSD__)
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outl(port, data);
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#endif
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#if defined(__NetBSD__)
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__asm__ volatile ("outl %0, %w1" : : "a"(data), "d"(port));
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#endif
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}
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uint8_t
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sys_inb(unsigned int port)
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{
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#if defined(__linux__) || defined (__OpenBSD__) \
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|| defined(__FreeBSD__)
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return inb(port);
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#endif
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#if defined(__NetBSD__)
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uint8_t retval;
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__asm__ volatile ("inb %w1, %b0" : "=a" (retval) : "d" (port));
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return retval;
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#endif
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return 0;
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}
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uint32_t
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sys_inl(unsigned int port)
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{
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#if defined(__linux__) || defined (__OpenBSD__) \
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|| defined(__FreeBSD__)
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return inl(port);
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#endif
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#if defined(__NetBSD__)
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int retval;
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__asm__ volatile ("inl %w1, %0" : "=a" (retval) : "d" (port));
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return retval;
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#endif
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return 0;
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}
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int
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sys_iopl(int level)
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{
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#if defined(__linux__)
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return iopl(level);
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#endif
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#if defined(__OpenBSD__)
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#if defined(__i386__)
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return i386_iopl(level);
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#elif defined(__amd64__)
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return amd64_iopl(level);
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#endif /* __amd64__ */
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#endif /* __OpenBSD__ */
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#if defined(__NetBSD__)
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#if defined(__i386__)
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return i386_iopl(level);
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#elif defined(__amd64__)
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return x86_64_iopl(level);
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#endif /* __amd64__ */
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#endif /* __NetBSD__ */
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#if defined(__FreeBSD__)
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/* Refer to io(4) manual page. This assumes the legacy behavior
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* where opening /dev/io raises the IOPL of the process */
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static int io_fd = -1;
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/* Requesting privileged access */
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if (level > 0) {
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if (io_fd == -1) {
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io_fd = open("/dev/io", O_RDONLY);
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return (io_fd == -1) ? -1 : 0;
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}
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/* Lowering access to lowest level */
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} else if (level == 0 && io_fd != -1) {
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if (close(io_fd) == -1) {
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return -1;
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} else {
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io_fd = -1;
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}
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}
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return 0;
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#endif /* __FreeBSD__ */
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errno = ENOSYS;
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return -1;
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}
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