When deciding HS-mode interrupts in processor_t:take_interrupt()
we should use "~state.hideleg" instead of "~MIP_VS_MASK" because
VS interrupt bits are writeable in HIDELEG CSR.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
We cannot blindly use proc variable in MMU emulation because external
debug emulation instantiates MMU with proc=NULL.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
When a single abstract command writes s0 and executes a program buffer
that leads to an exception, the value of s0 should still persist. The
fact that it did not masked the following bug in OpenOCD:
https://github.com/riscv/riscv-openocd/issues/559
Add a core parameter to the interactive str command. This makes it
possible for the spike user to specify the device whose memory contains
the NUL-terminated string to be printed.
The hstatus.GVA and mstatus.GVA should be set only when guest virtual
address is written to stval or mtval CSRs at time of taking trap.
This patch update access, page fault, and guest page fault trap classes
so that we can pass gva flag correct from source of the trap.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
This patch fixes VSSTATUS bits updations as follows:
1. set_csr() should not allow writs to VSSTATUS.SD bit instead
VSSTATUS.SD bit should be derived again after VSSTATUS is updated
2. set_virt() should copy FS, VS and XS bits when transitioning
from virt=on (VS/VU-mode) to virt=off (HS/M-mode)
Signed-off-by: Anup Patel <anup.patel@wdc.com>
The original implementation only uses the value in first core and apply it
to other core. The patch makes the configuration hetergeneous for differenct
cores.
Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
if no mmu
1. mask TVM and VTVM
2. wire satp and vsatp as 0
3. disable sfence_vma
4. allow only supported type
5. mask SUM/MXR
Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
some features are optional to u-arch or could be selectively supported.
Add an impl_table to keep implemented feature
Signed-off-by: Chih-Min Chao <chihmin.chao@sifive.com>
Andrew Waterman
Chih-Min Chao
Anup Patel
Mehmet Oguz Derin
Dave.Wen
Chih-Min Chao
Tim Newsome
Daniel Lustig
Will Hawkins
Daniel Bates
Marcus Comstedt
Scott Johnson