stm32f7x: Use CHIPNAME-specific name for ITCM bank

[openocd.git] / tcl / target / stm32f7x.cfg

diff --git a/tcl/target/stm32f7x.cfg b/tcl/target/stm32f7x.cfg
index 927a3e8d0595793efe57e6431c1eef92eeb24c17..ba1d12ffb25a98222e8787dfcecc3b6f2a29efe4 100755 (executable)
--- a/tcl/target/stm32f7x.cfg
+++ b/tcl/target/stm32f7x.cfg
@@ -51,9 +51,18 @@ set _FLASHNAME $_CHIPNAME.flash
 flash bank $_FLASHNAME stm32f2x 0 0 0 0 $_TARGETNAME
 flash bank $_CHIPNAME.otp stm32f2x 0x1ff0f000 0 0 0 $_TARGETNAME
 
-# Configuring the Flash via ITCM alias as virtual
-set _FLASH_ITCM_VMA itcm-flash.alias
-flash bank $_FLASH_ITCM_VMA virtual 0x00200000 0 0 0 $_TARGETNAME $_FLASHNAME
+# On the STM32F7, the Flash is mapped at address 0x08000000 via the AXI and
+# also address 0x00200000 via the ITCM. The former mapping is read-write in
+# hardware, while the latter is read-only. By presenting an alias, we
+# accomplish two things:
+# (1) We allow writing at 0x00200000 (because the alias acts identically to the
+#     original bank), which allows code intended to run from that address to
+#     also be linked for loading at that address, simplifying linking.
+# (2) We allow the proper memory map to be delivered to GDB, which will cause
+#     it to use hardware breakpoints at the 0x00200000 mapping (correctly
+#     identifying it as Flash), which it would otherwise not do. Configuring
+#     the Flash via ITCM alias as virtual
+flash bank $_CHIPNAME.itcm-flash.alias virtual 0x00200000 0 0 0 $_TARGETNAME $_FLASHNAME
 
 # adapter speed should be <= F_CPU/6. F_CPU after reset is 16MHz, so use F_JTAG = 2MHz
 adapter_khz 2000