df95126ccd
kernel: Remove unneeded debug logs & random cleanups
continuous-integration/drone/push Build is passing
2023-04-14 21:10:38 +02:00
54f2d35416
kernel: Add the fork() system call
2023-03-18 23:45:48 +01:00
8c72e9a49a
kernel: Add an exec() system call
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continuous-integration/drone/push Build is passing
Doesn't support arguments or environment for now.
2023-03-16 22:44:58 +01:00
3ec54fafde
x86_64/MMU: Do not allocate level 1 page tables for huge page entries
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continuous-integration/drone/pr Build is passing
continuous-integration/drone/push Build is passing
This would leak memory, since we would never end up using them.
2023-02-27 12:55:15 +01:00
752dfdbf1c
MemoryManager: Reuse the existing mapping of physical memory that MMU has
continuous-integration/drone/pr Build is passing
2023-02-27 12:51:29 +01:00
8df441064f
x86_64/MMU: Map the physical address space using huge pages
2023-02-27 12:47:17 +01:00
426f6e4da8
x86_64: Allow mapping huge pages, but don't do it yet
2023-02-27 12:41:28 +01:00
837d483e0b
x86_64/MMU: Copy from the mapped kernel directory instead of the physical version
continuous-integration/drone/pr Build is passing
2023-02-27 12:30:52 +01:00
995d1bc36e
x86_64/MMU: Map all physical memory into the higher half instead of using recursive mapping
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continuous-integration/drone/pr Build is passing
This still has a few problems. Notably, we are not using huge pages for this mapping, which would be a lot more efficient.
Right now, used memory is 8.1 MiB at boot for a 256MiB system.
But after improving it, this system will be much better than recursive mapping.
fork() will be MUCH easier to implement, for example.
2023-02-27 12:24:21 +01:00
d5b1d72396
x86_64/MMU: Map the kernel page directory to virtual memory
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This avoids depending on the kernel address space to create a new userspace one,
since there is no physical memory access.
This was fine for a single process, since its address space was created from the kernel one
and no more address spaces were created,
but for two or more, this started to become problematic, since we would create one address space
while being in another process's address space, which has no direct mapping of physical memory.
2023-01-22 14:46:03 +01:00
84c82a4e75
luna, kernel: More constness
continuous-integration/drone/push Build is passing
2023-01-10 19:31:41 +01:00
31ea030c7f
MMU: Add functions to create and delete userspace page directories
2023-01-05 21:50:26 +01:00
5854e5e530
Add newlines at end-of-file
2023-01-02 13:07:29 +01:00
a1eca479d5
x86_64: Add a getter for the initial page directory
continuous-integration/drone/push Build is passing
2022-12-26 12:57:25 +01:00
08984e1673
x86_64: Create a has_flag() helper function and remove redundant clearing of reserved bits
2022-12-26 12:10:47 +01:00
59765aa334
Rename String.h -> CString.h
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continuous-integration/drone/push Build is passing
Let's not confuse String.h with a managed string class, it's in fact the equivalent of the C stdlib's <string.h>
2022-12-16 20:40:04 +01:00
287c4ab060
Run clang-format
2022-12-07 16:11:59 +00:00
1badc40a4a
Run include-what-you-use everywhere
2022-12-07 11:40:02 +01:00
1e3706ac01
Make ARCH_PAGE_SIZE and ARCH_TIMER_FREQ known at compile-time
2022-12-05 16:36:41 +01:00
4f183958e3
General constness + [[gnu::packed]] everywhere
2022-12-05 16:13:38 +01:00
c7ab6bc2d3
Reorganize the luna/ directory so that headers aren't in the top level include path
2022-12-04 12:42:43 +01:00
d2856d8812
Provide meaningful error numbers
2022-11-30 17:13:59 +01:00
d96cb73995
Rename physical "pages" to "frames"
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AFAIK, this is the proper naming scheme. "Pages" are virtual, and "frames" physical.
2022-11-19 22:27:08 +01:00
70c6b78e35
Organize source tree
2022-11-19 17:59:49 +01:00
9d318d50aa
Use TRY in MMU.cpp
2022-11-16 20:37:41 +01:00
2c9329928c
Replace page_size (function) with ARCH_PAGE_SIZE (constant)
2022-11-16 20:37:32 +01:00
30ac95bcf8
Use usize/isize instead of (s)size_t
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Since we're using Rust-style integer types already, why not go all in?
2022-11-16 20:30:34 +01:00
e16324887f
MMU: Properly clear flags
2022-11-15 19:10:19 +01:00
ae235e5538
MMU: unmap and remap for x86_64
2022-11-13 16:51:21 +01:00
ba1bf72e1b
Remove unused include
2022-11-13 16:32:28 +01:00
d6c56fb512
Mapping finally works!!
2022-11-13 16:31:32 +01:00
4c4f72b865
More MMU stuff, but writing still fails
2022-11-13 15:33:53 +01:00
705c2747de
Add memory manager
2022-11-13 14:29:15 +01:00
