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initialise a memory structure or smth

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Signed-off-by: Amneesh Singh <natto@weirdnatto.in>
This commit is contained in:
Amneesh Singh
2023-09-11 10:23:46 +05:30
parent 84c68a4e00
commit 332f0b87d6
26 changed files with 763 additions and 163 deletions
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46
src/cpu/psr.hh
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@@ -1,55 +1,51 @@
#pragma once
#include "bits.hh"
#include "util/bits.hh"
#include "utility.hh"
#include <cstdint>
static constexpr uint32_t PSR_CLEAR_RESERVED = 0xf00000ff;
static constexpr uint32_t PSR_CLEAR_MODE = 0x0b00000;
class Psr {
uint32_t psr;
public:
// clear the reserved bits i.e, [8:27]
Psr(uint32_t raw) { psr = raw & PSR_CLEAR_RESERVED; }
Psr(uint32_t raw);
// Mode : [4:0]
Mode mode() const { return static_cast<Mode>(psr & ~PSR_CLEAR_MODE); }
void set_mode(Mode mode) {
psr &= PSR_CLEAR_MODE;
psr |= static_cast<uint32_t>(mode);
}
Mode mode() const;
void set_mode(Mode mode);
// State : [5]
bool state() const { return get_nth_bit(psr, 5); }
void set_state(State state) {
chg_nth_bit(psr, 5, static_cast<bool>(state));
}
bool state() const;
void set_state(State state);
#define GET_SET_NTH_BIT_FUNCTIONS(name, n) \
bool name() const { return get_nth_bit(psr, n); } \
void set_##name(bool val) { chg_nth_bit(psr, n, val); }
#define GET_SET_NTH_BIT_FUNCTIONS(name) \
bool name() const; \
void set_##name(bool val);
// FIQ disable : [6]
GET_SET_NTH_BIT_FUNCTIONS(fiq_disabled, 6)
GET_SET_NTH_BIT_FUNCTIONS(fiq_disabled)
// IRQ disable : [7]
GET_SET_NTH_BIT_FUNCTIONS(irq_disabled, 7)
GET_SET_NTH_BIT_FUNCTIONS(irq_disabled)
// Reserved bits : [27:8]
// Overflow flag : [28]
GET_SET_NTH_BIT_FUNCTIONS(v, 28);
GET_SET_NTH_BIT_FUNCTIONS(v)
// Carry flag : [29]
GET_SET_NTH_BIT_FUNCTIONS(c, 29);
GET_SET_NTH_BIT_FUNCTIONS(c)
// Zero flag : [30]
GET_SET_NTH_BIT_FUNCTIONS(z, 30);
GET_SET_NTH_BIT_FUNCTIONS(z)
// Negative flag : [30]
GET_SET_NTH_BIT_FUNCTIONS(n, 31);
GET_SET_NTH_BIT_FUNCTIONS(n)
#undef GET_SET_NTH_BIT_FUNCTIONS
private:
static constexpr uint32_t PSR_CLEAR_RESERVED = 0xf00000ff;
static constexpr uint32_t PSR_CLEAR_MODE = 0x0b00000;
uint32_t psr;
};