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Add a syscall for creating a physical memory VMO

This commit is contained in:
Drew Galbraith 2023-06-08 02:36:47 -07:00
parent 50201fe6df
commit 47e3d11060
4 changed files with 34 additions and 3 deletions
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3
zion/include/zcall.h
View File

@ -31,6 +31,7 @@
#define Z_INIT_VMAS_SELF 0x20
#define Z_MEMORY_OBJECT_CREATE 0x30
#define Z_MEMORY_OBJECT_CREATE_PHYSICAL 0x31
#define Z_TEMP_PCIE_CONFIG_OBJECT_CREATE 0x3F
@ -67,6 +68,8 @@ void ZThreadExit();
[[nodiscard]] z_err_t ZAddressSpaceMap(uint64_t vmas_cap, uint64_t vmas_offset,
uint64_t vmmo_cap, uint64_t* vaddr);
[[nodiscard]] z_err_t ZMemoryObjectCreate(uint64_t size, uint64_t* vmmo_cap);
[[nodiscard]] z_err_t ZMemoryObjectCreatePhysical(uint64_t paddr, uint64_t size,
uint64_t* vmmo_cap);
[[nodiscard]] z_err_t ZTempPcieConfigObjectCreate(uint64_t* vmmo_cap,
uint64_t* vmmo_size);

16
zion/syscall/syscall.cpp
View File

@ -130,14 +130,20 @@ z_err_t MemoryObjectCreate(ZMemoryObjectCreateReq* req,
return Z_OK;
}
z_err_t MemoryObjectCreatePhysical(ZMemoryObjectCreatePhysicalReq* req,
ZMemoryObjectCreateResp* resp) {
auto& curr_proc = gScheduler->CurrentProcess();
auto vmmo_ref = MakeRefCounted<FixedMemoryObject>(req->paddr, req->size);
resp->vmmo_cap =
curr_proc.AddCapability(StaticCastRefPtr<MemoryObject>(vmmo_ref));
return Z_OK;
}
z_err_t TempPcieConfigObjectCreate(ZTempPcieConfigObjectCreateResp* resp) {
auto& curr_proc = gScheduler->CurrentProcess();
uint64_t pci_base, pci_size;
dbgln("Getting config");
RET_ERR(GetPciExtendedConfiguration(&pci_base, &pci_size));
dbgln("Making obj");
auto vmmo_ref = MakeRefCounted<FixedMemoryObject>(pci_base, pci_size);
dbgln("Adding cap");
resp->vmmo_cap =
curr_proc.AddCapability(StaticCastRefPtr<MemoryObject>(vmmo_ref));
resp->vmmo_size = pci_size;
@ -201,6 +207,10 @@ extern "C" z_err_t SyscallHandler(uint64_t call_id, void* req, void* resp) {
return MemoryObjectCreate(
reinterpret_cast<ZMemoryObjectCreateReq*>(req),
reinterpret_cast<ZMemoryObjectCreateResp*>(resp));
case Z_MEMORY_OBJECT_CREATE_PHYSICAL:
return MemoryObjectCreatePhysical(
reinterpret_cast<ZMemoryObjectCreatePhysicalReq*>(req),
reinterpret_cast<ZMemoryObjectCreateResp*>(resp));
case Z_TEMP_PCIE_CONFIG_OBJECT_CREATE:
return TempPcieConfigObjectCreate(
reinterpret_cast<ZTempPcieConfigObjectCreateResp*>(resp));

13
zion/usr/zcall.cpp
View File

@ -73,6 +73,7 @@ z_err_t ZAddressSpaceMap(uint64_t vmas_cap, uint64_t vmas_offset,
*vaddr = resp.vaddr;
return ret;
}
z_err_t ZMemoryObjectCreate(uint64_t size, uint64_t* vmmo_cap) {
ZMemoryObjectCreateReq req{
.size = size,
@ -83,6 +84,18 @@ z_err_t ZMemoryObjectCreate(uint64_t size, uint64_t* vmmo_cap) {
return ret;
}
z_err_t ZMemoryObjectCreatePhysical(uint64_t paddr, uint64_t size,
uint64_t* vmmo_cap) {
ZMemoryObjectCreatePhysicalReq req{
.paddr = paddr,
.size = size,
};
ZMemoryObjectCreateResp resp;
z_err_t ret = SysCall2(Z_MEMORY_OBJECT_CREATE_PHYSICAL, &req, &resp);
*vmmo_cap = resp.vmmo_cap;
return ret;
}
z_err_t ZTempPcieConfigObjectCreate(uint64_t* vmmo_cap, uint64_t* vmmo_size) {
ZTempPcieConfigObjectCreateResp resp;
z_err_t ret = SysCall2(Z_TEMP_PCIE_CONFIG_OBJECT_CREATE, 0, &resp);

5
zion/usr/zcall_internal.h
View File

@ -46,6 +46,11 @@ struct ZMemoryObjectCreateResp {
uint64_t vmmo_cap;
};
struct ZMemoryObjectCreatePhysicalReq {
uint64_t paddr;
uint64_t size;
};
struct ZTempPcieConfigObjectCreateResp {
uint64_t vmmo_cap;
uint64_t vmmo_size;