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Platinum: implement memory controller registers.

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This commit is contained in:
Maxim Poliakovski 2022-03-21 15:04:07 +01:00
parent 8be44dad82
commit 4676cfeee2
2 changed files with 111 additions and 4 deletions
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84
devices/memctrl/platinum.cpp
View File

@ -50,6 +50,19 @@ uint32_t PlatinumCtrl::read(uint32_t reg_start, uint32_t offset, int size)
switch (offset) {
case PlatinumReg::CPU_ID:
return this->cpu_id;
case PlatinumReg::DRAM_REFRESH:
return this->dram_refresh;
case PlatinumReg::BANK_0_BASE:
case PlatinumReg::BANK_1_BASE:
case PlatinumReg::BANK_2_BASE:
case PlatinumReg::BANK_3_BASE:
case PlatinumReg::BANK_4_BASE:
case PlatinumReg::BANK_5_BASE:
case PlatinumReg::BANK_6_BASE:
case PlatinumReg::BANK_7_BASE:
return this->bank_base[(offset - PlatinumReg::BANK_0_BASE) >> 4];
case PlatinumReg::CACHE_CONFIG:
return 0; // report no L2 cache installed
default:
LOG_F(WARNING, "Platinum: unknown register read at offset 0x%X", offset);
}
@ -57,7 +70,76 @@ uint32_t PlatinumCtrl::read(uint32_t reg_start, uint32_t offset, int size)
return 0;
}
void PlatinumCtrl::write(uint32_t reg_start, uint32_t offset, uint32_t value, int size)
void PlatinumCtrl::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
{
switch (offset) {
case PlatinumReg::ROM_TIMING:
this->rom_timing = value;
break;
case PlatinumReg::DRAM_TIMING:
this->dram_timing = value;
break;
case PlatinumReg::DRAM_REFRESH:
this->dram_refresh = value;
break;
case PlatinumReg::FB_CONFIG_2:
this->fb_config_2 = value;
break;
case PlatinumReg::VRAM_REFRESH:
this->vram_refresh = value;
break;
case PlatinumReg::BANK_0_BASE:
case PlatinumReg::BANK_1_BASE:
case PlatinumReg::BANK_2_BASE:
case PlatinumReg::BANK_3_BASE:
case PlatinumReg::BANK_4_BASE:
case PlatinumReg::BANK_5_BASE:
case PlatinumReg::BANK_6_BASE:
case PlatinumReg::BANK_7_BASE:
this->bank_base[(offset - PlatinumReg::BANK_0_BASE) >> 4] = value;
break;
default:
LOG_F(WARNING, "Platinum: unknown register write at offset 0x%X", offset);
}
}
void PlatinumCtrl::insert_ram_dimm(int slot_num, uint32_t capacity)
{
if (slot_num < 0 || slot_num >= 4) {
ABORT_F("Platinum: invalid DIMM slot %d", slot_num);
}
switch (capacity) {
case DRAM_CAP_2MB:
case DRAM_CAP_4MB:
case DRAM_CAP_8MB:
case DRAM_CAP_16MB:
case DRAM_CAP_32MB:
case DRAM_CAP_64MB:
this->bank_size[slot_num * 2 + 0] = capacity;
break;
case DRAM_CAP_128MB:
this->bank_size[slot_num * 2 + 0] = DRAM_CAP_64MB;
this->bank_size[slot_num * 2 + 1] = DRAM_CAP_64MB;
break;
default:
ABORT_F("Platinum: unsupported DRAM capacity %d", capacity);
}
}
void PlatinumCtrl::map_phys_ram()
{
uint32_t total_ram = 0;
for (int i = 0; i < 8; i++) {
total_ram += this->bank_size[i];
}
if (total_ram > DRAM_CAP_64MB) {
ABORT_F("Platinum: RAM bigger than 64MB not supported yet");
}
if (!add_ram_region(0x00000000, total_ram)) {
ABORT_F("Platinum: could not allocate RAM storage");
}
}

29
devices/memctrl/platinum.h
View File

@ -116,7 +116,20 @@ enum PlatinumReg : uint32_t {
BANK_6_BASE = 0x0C0,
BANK_7_BASE = 0x0D0,
GP_SW_SCRATCH = 0x0E0,
PCI_ADDR_MASK = 0x0F0
PCI_ADDR_MASK = 0x0F0,
FB_CONFIG_1 = 0x140,
FB_CONFIG_2 = 0x150,
VRAM_REFRESH = 0x1B0,
};
enum {
DRAM_CAP_2MB = (1 << 21),
DRAM_CAP_4MB = (1 << 22),
DRAM_CAP_8MB = (1 << 23),
DRAM_CAP_16MB = (1 << 24),
DRAM_CAP_32MB = (1 << 25),
DRAM_CAP_64MB = (1 << 26),
DRAM_CAP_128MB = (1 << 27),
};
}; // namespace Platinum
@ -132,11 +145,23 @@ public:
/* MMIODevice methods */
uint32_t read(uint32_t reg_start, uint32_t offset, int size);
void write(uint32_t reg_start, uint32_t offset, uint32_t value, int size);
void write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size);
void insert_ram_dimm(int slot_num, uint32_t capacity);
void map_phys_ram();
private:
uint32_t cpu_id;
uint8_t cpu_type; // 0 - MPC601, 1 - 603/604 CPU
// memory controller state
uint32_t rom_timing = 0;
uint32_t dram_timing = 0xEFF;
uint32_t dram_refresh = 0x1F4;
uint32_t fb_config_2 = 0x1FFF;
uint32_t vram_refresh = 0x1F4;
uint32_t bank_base[8];
uint32_t bank_size[8] = { 0 };
};
#endif // PLATINUM_MEMCTRL_H