This patch series allow qemu-system-loongarch64 to emulate a LoongArch32 machine. A new CPU model (la132) is added for loongarch32, however due to lack of public documentation, details will need to be added in the future. Initial GDB support is added.
At the same time, VA32(32-bit virtual address) support is introduced for LoongArch64. LA32 support is tested using a small supervisor program at https://github.com/jiegec/supervisor-la32. VA32 mode under LA64 is not tested yet. Changes since v4: - Code refactor, thanks Richard Henderson for great advice - Truncate higher 32 bits of PC in VA32 mode - Revert la132 initfn refactor Changes since v3: - Support VA32 mode for LoongArch64 - Check the current arch from CPUCFG.ARCH - Reject la64-only instructions in la32 mode Changes since v2: - Fix typo in previous commit - Fix VPPN width in TLBEHI/TLBREHI Changes since v1: - No longer create a separate qemu-system-loongarch32 executable, but allow user to run loongarch32 emulation using qemu-system-loongarch64 - Add loongarch32 cpu support for virt machine Full changes: Jiajie Chen (11): target/loongarch: Add function to check current arch target/loongarch: Add new object class for loongarch32 cpus target/loongarch: Add GDB support for loongarch32 mode target/loongarch: Support LoongArch32 TLB entry target/loongarch: Support LoongArch32 DMW target/loongarch: Support LoongArch32 VPPN target/loongarch: Add LA64 & VA32 to DisasContext target/loongarch: Reject la64-only instructions in la32 mode target/loongarch: Truncate high 32 bits of address in VA32 mode target/loongarch: Sign extend results in VA32 mode target/loongarch: Add loongarch32 cpu la132 configs/targets/loongarch64-softmmu.mak | 2 +- gdb-xml/loongarch-base32.xml | 45 ++++++++ hw/loongarch/virt.c | 5 - target/loongarch/cpu-csr.h | 22 ++-- target/loongarch/cpu.c | 74 +++++++++++-- target/loongarch/cpu.h | 33 ++++++ target/loongarch/gdbstub.c | 34 ++++-- target/loongarch/insn_trans/trans_arith.c.inc | 32 +++--- .../loongarch/insn_trans/trans_atomic.c.inc | 81 +++++++------- target/loongarch/insn_trans/trans_bit.c.inc | 28 ++--- .../loongarch/insn_trans/trans_branch.c.inc | 11 +- target/loongarch/insn_trans/trans_extra.c.inc | 16 +-- .../loongarch/insn_trans/trans_fmemory.c.inc | 30 ++---- target/loongarch/insn_trans/trans_fmov.c.inc | 4 +- target/loongarch/insn_trans/trans_lsx.c.inc | 38 ++----- .../loongarch/insn_trans/trans_memory.c.inc | 102 ++++++++---------- target/loongarch/insn_trans/trans_shift.c.inc | 14 +-- target/loongarch/op_helper.c | 4 +- target/loongarch/tlb_helper.c | 66 +++++++++--- target/loongarch/translate.c | 43 ++++++++ target/loongarch/translate.h | 9 ++ 21 files changed, 445 insertions(+), 248 deletions(-) create mode 100644 gdb-xml/loongarch-base32.xml -- 2.41.0
