gem5  v22.1.0.0
qemu_fw_cfg.cc
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27 
28 #include "dev/x86/qemu_fw_cfg.hh"
29 
30 #include "arch/x86/bios/e820.hh"
31 #include "base/compiler.hh"
32 #include "base/logging.hh"
33 #include "sim/byteswap.hh"
34 
35 namespace gem5
36 {
37 
38 namespace qemu
39 {
40 
41 FwCfgItemE820::FwCfgItemE820(const QemuFwCfgItemE820Params &p) :
42  FwCfgItemFixed(p.path, p.arch_specific, p.index)
43 {
44  struct GEM5_PACKED Entry
45  {
46  uint64_t addr;
47  uint64_t size;
48  uint32_t type;
49  };
50 
51  uint32_t count = p.entries.size();
52 
53  panic_if(count >= 128, "Too many E820 entries (%d).", count);
54 
55  size_t bytes = count * sizeof(Entry);
56  data.resize(bytes);
57 
58  uint8_t *ptr = data.data();
59 
60  // Write out the e820 entries.
61  for (auto *e: p.entries) {
62  Entry entry{htole(e->addr), htole(e->size), htole(e->type)};
63  std::memcpy(ptr, &entry, sizeof(entry));
64  ptr += sizeof(entry);
65  }
66 };
67 
68 } // namespace qemu
69 } // namespace gem5
FwCfgItemE820(const QemuFwCfgItemE820Params &p)
Definition: qemu_fw_cfg.cc:41
const void * bytes() const override
Definition: qemu_fw_cfg.hh:51
std::vector< uint8_t > data
Definition: qemu_fw_cfg.hh:46
#define panic_if(cond,...)
Conditional panic macro that checks the supplied condition and only panics if the condition is true a...
Definition: logging.hh:204
Bitfield< 9 > e
Definition: misc_types.hh:65
Bitfield< 30, 0 > index
Bitfield< 54 > p
Definition: pagetable.hh:70
Bitfield< 3 > addr
Definition: types.hh:84
Reference material can be found at the JEDEC website: UFS standard http://www.jedec....
T htole(T value)
Definition: byteswap.hh:172
PM4 packets.
Definition: pm4_defines.hh:78

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