1 files changed, 41 insertions, 0 deletions
diff --git a/chip/ish/ish_dma.h b/chip/ish/ish_dma.h
index fb9c4f4f06..89d6cb7342 100644
--- a/chip/ish/ish_dma.h
+++ b/chip/ish/ish_dma.h
@@ -27,6 +27,47 @@
 
 #define PAGE_SIZE 4096
 
+static inline uint32_t interrupt_lock(void)
+{
+	uint32_t eflags = 0;
+
+	__asm__ volatile("pushfl;" /* save eflag value */
+			 "popl  %0;"
+			 "cli;"
+			 : "=r"(eflags)); /* shut off interrupts */
+	return eflags;
+}
+
+static inline void interrupt_unlock(uint32_t eflags)
+{
+	__asm__ volatile("pushl  %0;" /* restore elfag values */
+			 "popfl;"
+			 :
+			 : "r"(eflags));
+}
+
+static inline int dma_poll(uint32_t addr, uint32_t expected, uint32_t mask)
+{
+	int retval = -1;
+	uint32_t counter = 0;
+
+	/*
+	 * The timeout is approximately 2.2 seconds according to
+	 * value of UINT32_MAX, 120MHZ ISH clock frequency and
+	 * instruction count which is around 4.
+	 */
+	while (counter < (UINT32_MAX / 64)) {
+		/* test condition */
+		if ((REG32(addr) & mask) == expected) {
+			retval = DMA_RC_OK;
+			break;
+		}
+		counter++;
+	}
+
+	return retval;
+}
+
 /**
  * SRAM: ISH local static ram
  * UMA: Protected system DRAM region dedicated for ISH