Fix remoteproc to work with the PRU GNU Binutils port

PRU IRAM addresses need to be masked before being handled to
remoteproc. This is due to PRU Binutils' lack of separate address
spaces for IRAM and DRAM.

Signed-off-by: Dimitar Dimitrov <[email protected]>

Author: dinuxbg

drivers/remoteproc/pru_rproc.c

@@ -891,6 +891,14 @@ static void *pru_d_da_to_va(struct pru_rproc *pru, u32 da, int len)
 	u32 offset;
 	void *va = NULL;
 
+	/* GNU binutils do not support multiple address spaces. The
+	 * default linker script from the official GNU pru-ld places
+	 * IRAM at an arbitrary high offset, in order to differentiate it
+	 * from DRAM. Hence we need to strip the artificial offset
+	 * from the IRAM address.
+	 */
+	da &= ~0xf0000000u;
+
 	if (len <= 0)
 		return NULL;