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Annotation of nono/vm/gvram.cpp, revision 1.1.1.2

1.1       root        1: //
                      2: // nono
                      3: // Copyright (C) 2018 [email protected]
                      4: //
                      5: 
                      6: #include "gvram.h"
                      7: #include "vicon.h"
                      8: 
                      9: //
                     10: // GVRAM
                     11: //
                     12: // GVRAM はワード単位でホストバイトオーダ配置なので、
                     13: // バイトアクセス時は HB() マクロを使用のこと。
                     14: //
                     15: 
1.1.1.2 ! root       16: std::unique_ptr<GVRAMDevice> gGVRAM;
1.1       root       17: 
                     18: GVRAMDevice::GVRAMDevice()
                     19: {
                     20:        logname = "gvram";
                     21:        devname = "GVRAM";
                     22:        devaddr = 0xc00000;
                     23:        devlen  = 0x200000;     // XXX とりあえず
                     24: 
1.1.1.2 ! root       25:        mem.reset(new uint8[devlen]);
1.1       root       26: }
                     27: 
                     28: GVRAMDevice::~GVRAMDevice()
                     29: {
                     30: }
                     31: 
                     32: uint64
                     33: GVRAMDevice::Read8(uint32 addr)
                     34: {
                     35:        uint32 offset = addr - devaddr;
                     36:        return mem[HB(offset)];
                     37: }
                     38: 
                     39: uint64
                     40: GVRAMDevice::Read16(uint32 addr)
                     41: {
                     42:        uint32 offset = addr - devaddr;
                     43:        return *(uint16 *)&mem[offset];
                     44: }
                     45: 
                     46: uint64
                     47: GVRAMDevice::Write8(uint32 addr, uint32 data)
                     48: {
                     49:        uint32 offset = addr - devaddr;
                     50:        mem[HB(offset)] = data;
                     51:        return 0;
                     52: }
                     53: 
                     54: uint64
                     55: GVRAMDevice::Write16(uint32 addr, uint32 data)
                     56: {
                     57:        uint32 offset = addr - devaddr;
                     58:        *(uint16 *)&mem[offset] = data;
                     59:        return 0;
                     60: }
                     61: 
                     62: uint64
                     63: GVRAMDevice::Peek8(uint32 addr)
                     64: {
                     65:        return mem[HB(addr - devaddr)];
                     66: }

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