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Add a static variable to the panic function that should lock all other
CPUs.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Strip the code calling for the memory manager to allocate pages to
kmalloc. The function should just return a raw pointer while a page
fault will allocate the required memory.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Add a panic function that stops the current CPU and prints an error
message into the ring buffer.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Add more functions to the string library to process buffers and strings.
Signed-off-by: Danny Holman <dholman@gymli.org>
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The function kprintf should print to an internal ringbuffer instead of
directly to the framebuffer. This reduces dependence on the existence of
a framebuffer in the first place.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Add a simple implementation of kmalloc. This system only works on
x86-based processors at the time of commit.
Signed-off-by: Danny Holman <dholman@gymli.org>
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Create files that add IDT support for i386.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Add a set of routines that setup the x86's global descriptor table.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Add a 'k' prefix to the kernel versions of the printf family.
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Add a function in the serial interface that writes an entire string to
the serial line.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Iterate over a formatted string with an index and strlen instead of
using a non-const pointer. The latter method may result in unsafe memory
conditions.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Keep const pointers const when casting from void to char.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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The function serial_init should not be declared as static. This function
could change under a different architecture and should be defined with
the target architecture.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Add support for serial communication in the i386 architecture.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Finish implementing the functions from string.h in string.c.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Implement a basic printf function using primitives from the TTY library.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Add the main initialiazation functions within the main kernel directory.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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Add implementations for functions declared in string.h.
Signed-off-by: Danny Holman <dholman@gymli.xyz>
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