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[kernel] Rename stack_cache to buffer_cache

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Renamed and genericized the stack_cache class to manage any address
range area of buffers or memory regions. Removed singleton and created
some globals that map to different address regions (kernel stacks,
kernel buffers).

Tags: vmem virtual memeory
This commit is contained in:
Justin C. Miller
2020-08-30 17:59:13 -07:00
parent 773617cbf3
commit f27b133089
6 changed files with 81 additions and 72 deletions
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6
src/kernel/objects/thread.cpp
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@@ -3,7 +3,7 @@
#include "objects/thread.h"
#include "objects/process.h"
#include "scheduler.h"
#include "stack_cache.h"
#include "buffer_cache.h"
extern "C" void kernel_to_user_trampoline();
static constexpr j6_signal_t thread_default_signals = 0;
@@ -29,7 +29,7 @@ thread::thread(process &parent, uint8_t pri, uintptr_t rsp0) :
thread::~thread()
{
stack_cache::get().return_stack(m_tcb.kernel_stack);
g_kstack_cache.return_buffer(m_tcb.kernel_stack);
}
thread *
@@ -150,7 +150,7 @@ thread::setup_kernel_stack()
constexpr unsigned null_frame_entries = 2;
constexpr size_t null_frame_size = null_frame_entries * sizeof(uint64_t);
uintptr_t stack_addr = stack_cache::get().get_stack();
uintptr_t stack_addr = g_kstack_cache.get_buffer();
uintptr_t stack_end = stack_addr + stack_bytes;
uint64_t *null_frame = reinterpret_cast<uint64_t*>(stack_end - null_frame_size);