diff options
Diffstat (limited to 'src/arch/riscv')
| -rw-r--r-- | src/arch/riscv/virtual_memory.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/src/arch/riscv/virtual_memory.c b/src/arch/riscv/virtual_memory.c index a7a81fbab5..cda9057939 100644 --- a/src/arch/riscv/virtual_memory.c +++ b/src/arch/riscv/virtual_memory.c @@ -95,6 +95,22 @@ void init_vm(uintptr_t virtMemStart, uintptr_t physMemStart, uintptr_t pageTable } void initVirtualMemory(void) { + uintptr_t ms; + + ms = read_csr(mstatus); + ms = INSERT_FIELD(ms, MSTATUS_VM, VM_CHOICE); + write_csr(mstatus, ms); + ms = read_csr(mstatus); + + if (EXTRACT_FIELD(ms, MSTATUS_VM) != VM_CHOICE) { + printk(BIOS_DEBUG, "We don't have virtual memory...\n"); + return; + } else { + printk(BIOS_DEBUG, "-----------------------------\n"); + printk(BIOS_DEBUG, "Virtual memory status enabled\n"); + printk(BIOS_DEBUG, "-----------------------------\n"); + } + printk(BIOS_DEBUG, "Initializing virtual memory...\n"); uintptr_t physicalStart = 0x1000000; // TODO: Figure out how to grab this from cbfs uintptr_t virtualStart = 0xffffffff81000000; @@ -114,19 +130,9 @@ void mstatus_init(void) ms = INSERT_FIELD(ms, MSTATUS_PRV1, PRV_S); ms = INSERT_FIELD(ms, MSTATUS_PRV2, PRV_U); ms = INSERT_FIELD(ms, MSTATUS_IE2, 1); - ms = INSERT_FIELD(ms, MSTATUS_VM, VM_CHOICE); ms = INSERT_FIELD(ms, MSTATUS_FS, 3); ms = INSERT_FIELD(ms, MSTATUS_XS, 3); write_csr(mstatus, ms); - ms = read_csr(mstatus); - - if (EXTRACT_FIELD(ms, MSTATUS_VM) != VM_CHOICE) { - printk(BIOS_DEBUG, "we don't have virtual memory...\n"); - } else { - printk(BIOS_DEBUG, "-----------------------------\n"); - printk(BIOS_DEBUG, "virtual memory status enabled\n"); - printk(BIOS_DEBUG, "-----------------------------\n"); - } clear_csr(mip, MIP_MSIP); set_csr(mie, MIP_MSIP); |