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page-set per run-mode

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This commit is contained in:
folkert van heusden 2022-03-21 22:31:27 +01:00
parent 643075aa86
commit 8f5a05d0d2
2 changed files with 27 additions and 17 deletions
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40
bus.cpp
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@ -22,9 +22,11 @@ bus::bus()
{
m = new memory(n_pages * 8192);
for(int rm=0; rm<4; rm++) {
for(int i=0; i<n_pages; i++) {
pages[i].par = (i & 7) * 8192 / 64;
pages[i].pdr = (3 << 1) | (0 << 4) | (0 << 6) | ((8192 / (32 * 2)) << 8);
pages[rm][i].par = (i & 7) * 8192 / 64;
pages[rm][i].pdr = (3 << 1) | (0 << 4) | (0 << 6) | ((8192 / (32 * 2)) << 8);
}
}
CPUERR = MMR0 = MMR1 = MMR2 = MMR3 = PIR = CSR = 0;
@ -50,6 +52,8 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
// fprintf(stderr, "read [%d] from %06o [%d]\n", word_mode, a, use_prev);
uint16_t temp = 0;
int run_mode = c->getPSW() >> 14;
if (a >= 0160000) {
D(fprintf(stderr, "read%c I/O %o\n", word_mode ? 'b' : ' ', a);)
@ -90,25 +94,25 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
/// MMU ///
if (a >= 0172300 && a < 0172320) {
uint16_t t = pages[((a & 017) >> 1)].pdr;
uint16_t t = pages[run_mode][((a & 017) >> 1)].pdr;
D(fprintf(stderr, "read PDR for %d: %o\n", (a & 017) >> 1, t);)
return t;
}
if (a >= 0172340 && a < 0172360) {
uint16_t t = pages[((a & 017) >> 1)].par;
uint16_t t = pages[run_mode][((a & 017) >> 1)].par;
D(fprintf(stderr, "read PAR for %d: %o\n", (a & 017) >> 1, t);)
return t;
}
if (a >= 0177600 && a < 0177620) {
uint16_t t = pages[((a & 017) >> 1) + 8].pdr;
uint16_t t = pages[run_mode][((a & 017) >> 1) + 8].pdr;
D(fprintf(stderr, "read PDR for %d: %o\n", ((a & 017) >> 1) + 8, t);)
return t;
}
if (a >= 0177640 && a < 0177660) {
uint16_t t = pages[((a & 017) >> 1) + 8].par;
uint16_t t = pages[run_mode][((a & 017) >> 1) + 8].par;
D(fprintf(stderr, "read PAR for %d: %o\n", ((a & 017) >> 1) + 8, t);)
return t;
}
@ -268,7 +272,7 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
if (a < 256 * 4)
is_user = false;
uint32_t m_offset = pages[apf + is_user * 8].par * 64;
uint32_t m_offset = pages[run_mode][apf + is_user * 8].par * 64;
if ((a & 1) && word_mode == 0)
D(fprintf(stderr, "odd addressing\n");)
@ -284,8 +288,11 @@ uint16_t bus::read(const uint16_t a, const bool word_mode, const bool use_prev)
uint32_t bus::calculate_full_address(const uint16_t a)
{
const uint8_t apf = a >> 13; // active page field
bool is_user = c -> getBitPSW(14) && c -> getBitPSW(15);
uint32_t m_offset = pages[apf + is_user * 8].par * 64;
int run_mode = c->getPSW() >> 14;
bool is_user = run_mode == 3;
uint32_t m_offset = pages[run_mode][apf + is_user * 8].par * 64;
return m_offset + (a & 8191);
}
@ -295,6 +302,8 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
// fprintf(stderr, "write [%d] %06o to %06o\n", word_mode, value, a);
//D(fprintf(stderr, "write bus %o(%d): %o\n", a, word_mode, value);)
int run_mode = c->getPSW() >> 14;
if (a >= 0160000) {
D(fprintf(stderr, "write%c %o to I/O %o\n", word_mode ? 'b' : ' ', value, a);)
@ -433,27 +442,28 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
}
/// MMU ///
if (a >= 0172300 && a < 0172320) {
D(fprintf(stderr, "write set PDR for %d to %o\n", (a & 017) >> 1, value);)
pages[((a & 017) >> 1)].pdr = value;
pages[run_mode][((a & 017) >> 1)].pdr = value;
return value;
}
if (a >= 0172340 && a < 0172360) {
D(fprintf(stderr, "write set PAR for %d to %o\n", (a & 017) >> 1, value);)
pages[((a & 017) >> 1)].par = value;
pages[run_mode][((a & 017) >> 1)].par = value;
return value;
}
if (a >= 0117600 && a < 0117620) {
D(fprintf(stderr, "write set PDR for %d to %o\n", ((a & 017) >> 1) + 8, value);)
pages[((a & 017) >> 1) + 8].pdr = value;
pages[run_mode][((a & 017) >> 1) + 8].pdr = value;
return value;
}
if (a >= 0117640 && a < 0177660) {
D(fprintf(stderr, "write set PAR for %d to %o\n", ((a & 017) >> 1) + 8, value);)
pages[((a & 017) >> 1) + 8].par = value;
pages[run_mode][((a & 017) >> 1) + 8].par = value;
return value;
}
@ -485,14 +495,14 @@ uint16_t bus::write(const uint16_t a, const bool word_mode, uint16_t value, cons
const uint8_t apf = a >> 13; // active page field
bool is_user = use_prev ? (c -> getBitPSW(12) && c -> getBitPSW(13)) : (c -> getBitPSW(14) && c -> getBitPSW(15));
uint32_t m_offset = pages[apf + is_user * 8].par * 64;
uint32_t m_offset = pages[run_mode][apf + is_user * 8].par * 64;
// always write interrupt etc vectors from to kernel space
// TODO: check rights
if (a < 256 * 4)
is_user = false;
pages[apf].pdr |= 1 << 6; // page has been written to
pages[run_mode][apf].pdr |= 1 << 6; // page has been written to
if ((a & 1) && word_mode == 0)
D(fprintf(stderr, "odd addressing\n");)

2
bus.h
View file

@ -29,7 +29,7 @@ private:
memory *m { nullptr };
page_t pages[16] { { 0, 0 } };
page_t pages[4][16] { { 0, 0 } };
uint16_t MMR0 { 0 }, MMR1 { 0 }, MMR2 { 0 }, MMR3 { 0 }, CPUERR { 0 }, PIR { 0 }, CSR { 0 };