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https://github.com/justinian/jsix.git
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ea9d20a250
Created the framework for using different loadable panic handlers, loaded by the bootloader. Initial panic handler is panic.serial, which contains its own serial driver and stacktrace code. Other related changes: - Asserts are now based on the NMI handler - panic handlers get installed as the NMI interrupt handler - Changed symbol table generation: now use nm's own demangling and sorting, and include symbol size in the table - Move the linker script argument out of the kernel target, and into the kernel's specific module, so that other programs (ie, panic handlers) can use the kernel target as well - Some asm changes to boot.s to help GDB see stack frames - but this might not actually be all that useful - Renamed user_rsp to just rsp in cpu_state - everything in there is describing the 'user' state
24 lines
509 B
C++
24 lines
509 B
C++
#pragma once
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#include <stdint.h>
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extern "C" {
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/// Read a byte from an IO port.
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/// \arg port The address of the IO port
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/// \returns One byte read from the port
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uint8_t inb(uint16_t port);
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/// Write a byte to an IO port.
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/// \arg port The addres of the IO port
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/// \arg val The byte to write
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void outb(uint16_t port, uint8_t val);
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/// Pause briefly by doing IO to port 0x80
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/// \arg times Number of times to delay by writing
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void io_wait(unsigned times = 1);
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}
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constexpr uint16_t COM1 = 0x03f8;
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