target-arm: Add arm_boot_info secure_boot control

[qemu.git] / target-lm32 / README

diff --git a/target-lm32/README b/target-lm32/README
index a1c2c7eb1eab86f8aa0e92165b50397319ea19fb..ba3508a7116518fa8d9194410090f63863301b40 100644 (file)
--- a/target-lm32/README
+++ b/target-lm32/README
@@ -16,14 +16,13 @@ This will make serial0 (the lm32_uart) and serial1 (the JTAG UART)
 available as virtual consoles.
 
 
-Programmatically terminate the emulator
-----------------------------------------
-Originally neither the LatticeMico32 nor its peripherals support a
-mechanism to shut down the machine. Emulation aware programs can write to a
-to a special register within the system control block to shut down the
-virtual machine.  For more details see hw/lm32_sys.c. The lm32-evr is the
-first BSP which instantiate this model. A (32 bit) write to 0xfff0000
-causes a vm shutdown.
+Semihosting
+-----------
+Semihosting on this target is supported. Some system calls like read, write
+and exit are executed on the host if semihosting is enabled. See
+target/lm32-semi.c for all supported system calls. Emulation aware programs
+can use this mechanism to shut down the virtual machine and print to the
+host console. See the tcg tests for an example.
 
 
 Special instructions