6 #define SRAM_LOOPS_PER_USEC 24
7 #define SRAM_LOOP(loops) do { unsigned int i = (loops); if (i < 7) i = 7; barrier(); asm volatile(".align 4; 1: subs %0, %0, #1; bne 1b;" : "+r" (i)); } while (0)
8 /* delay on slow mode */
9 #define sram_udelay(usecs) SRAM_LOOP((usecs)*SRAM_LOOPS_PER_USEC)
10 /* delay on deep slow mode */
11 #define sram_32k_udelay(usecs) SRAM_LOOP(((usecs)*SRAM_LOOPS_PER_USEC)/(24000000/32768))