| Message ID | 20231015205913.264782-3-kbastian@mail.uni-paderborn.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | TriCore Semihosting | expand |
On 10/15/23 13:59, Bastian Koppelmann wrote: > Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> > --- > target/tricore/tricore-semi.c | 52 +++++++++++++++++++++++++++++++++++ > 1 file changed, 52 insertions(+) > > diff --git a/target/tricore/tricore-semi.c b/target/tricore/tricore-semi.c > index 27e1bdc59d..ccbeae4bc0 100644 > --- a/target/tricore/tricore-semi.c > +++ b/target/tricore/tricore-semi.c > @@ -164,6 +164,52 @@ static void tricore_vio_set_result(CPUTriCoreState *env, int retval, > env->gpr_d[12] = tricore_vio_errno_h2g(host_errno); > } > > +static void tricore_vio_readwrite(CPUTriCoreState *env, bool is_write) > +{ > + CPUState *cs = env_cpu(env); > + hwaddr paddr, sz; > + uint32_t page_left, io_sz, vaddr; > + size_t count; > + ssize_t ret = 0; > + > + int fd = env->gpr_d[4]; > + vaddr = env->gpr_a[4]; > + count = env->gpr_d[5]; > + > + while (count > 0) { > + paddr = cpu_get_phys_page_debug(cs, vaddr); > + page_left = TARGET_PAGE_SIZE - (vaddr & (TARGET_PAGE_SIZE - 1)); > + io_sz = page_left < count ? page_left : count; > + sz = io_sz; > + void *buf = cpu_physical_memory_map(paddr, &sz, true); > + > + if (buf) { > + vaddr += io_sz; > + count -= io_sz; > + ret = is_write ? > + write(fd, buf, io_sz) : > + read(fd, buf, io_sz); You should be able to use "semihosting/syscalls.h". Compare m68k-semi.c. r~
diff --git a/target/tricore/tricore-semi.c b/target/tricore/tricore-semi.c index 27e1bdc59d..ccbeae4bc0 100644 --- a/target/tricore/tricore-semi.c +++ b/target/tricore/tricore-semi.c @@ -164,6 +164,52 @@ static void tricore_vio_set_result(CPUTriCoreState *env, int retval, env->gpr_d[12] = tricore_vio_errno_h2g(host_errno); } +static void tricore_vio_readwrite(CPUTriCoreState *env, bool is_write) +{ + CPUState *cs = env_cpu(env); + hwaddr paddr, sz; + uint32_t page_left, io_sz, vaddr; + size_t count; + ssize_t ret = 0; + + int fd = env->gpr_d[4]; + vaddr = env->gpr_a[4]; + count = env->gpr_d[5]; + + while (count > 0) { + paddr = cpu_get_phys_page_debug(cs, vaddr); + page_left = TARGET_PAGE_SIZE - (vaddr & (TARGET_PAGE_SIZE - 1)); + io_sz = page_left < count ? page_left : count; + sz = io_sz; + void *buf = cpu_physical_memory_map(paddr, &sz, true); + + if (buf) { + vaddr += io_sz; + count -= io_sz; + ret = is_write ? + write(fd, buf, io_sz) : + read(fd, buf, io_sz); + if (ret == -1) { + ret = 0; + tricore_vio_set_result(env, ret, EINVAL); + } else { + tricore_vio_set_result(env, ret, errno); + } + } + cpu_physical_memory_unmap(buf, sz, !is_write, ret); + } +} + +static void tricore_vio_read(CPUTriCoreState *env) +{ + tricore_vio_readwrite(env, false); +} + +static void tricore_vio_write(CPUTriCoreState *env) +{ + tricore_vio_readwrite(env, true); +} + #define TRICORE_VIO_MARKER 0x6f69765f /* "_vio" */ #define TRICORE_VIO_EXIT_MARKER 0xE60 @@ -188,6 +234,12 @@ void helper_tricore_semihost(CPUTriCoreState *env, uint32_t pc) syscall = (int)env->gpr_d[12]; switch (syscall) { + case SYS__READ: + tricore_vio_read(env); + break; + case SYS__WRITE: + tricore_vio_write(env); + break; default: qemu_log_mask(LOG_GUEST_ERROR, "%s(%d): not implemented\n", __func__, syscall);
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> --- target/tricore/tricore-semi.c | 52 +++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+)