nop
/* Setup clocking mode */
- ldr r0, OMAP5910_MPU_CLKM_BASE @ prepare base of CLOCK unit
- ldrh r1, [r0, #0x18] @ get reset status
+ ldr r0, OMAP5910_MPU_CLKM_BASE @ base of CLOCK unit
+ ldrh r1, [r0, #0x18] @ ARM_SYST - get reset status
bic r1, r1, #(7 << 11) @ clear clock select
orr r1, r1, #(2 << 11) @ set synchronous scalable
- mov r2, #0 @ set wait counter to 100 clock cycles
-
-icache_loop:
- cmp r2, #0x01
- streqh r1, [r0, #0x18]
- add r2, r2, #0x01
- cmp r2, #0x10
- bne icache_loop
+ mov r2, #0
+loop:
+ cmp r2, #1 @ this loop will wait for at least 100 cycles
+ streqh r1, [r0, #0x18] @ before issuing next request from MPU
+ add r2, r2, #1 @ on the 1st run code is loaded into I-cache
+ cmp r2, #16 @ and second run will set clocking mode
+ bne loop
nop
- /* Setup clock divisors */
- ldr r0, OMAP5910_MPU_CLKM_BASE @ base of CLOCK unit
+ /* Setup clock dividers */
ldr r1, _OMAP5910_ARM_CKCTL
orr r1, r1, #0x2000 @ enable DSP clock
- strh r1, [r0, #0x00] @ setup clock divisors
+ strh r1, [r0] @ setup clock divisors
/* Setup DPLL to generate requested freq */
ldr r0, OMAP5910_DPLL1_BASE @ base of DPLL1 register
ldr r1, _OMAP5910_ARM_EN_CLK
strh r1, [r0, #0x08]
mov r1, #0x003f @ FLASH.RP not enabled in idle and
- @ max delayed ( 32 x CLKIN )
- strh r1, [r0, #0x0c]
+ strh r1, [r0, #0x0c] @ max delayed ( 32 x CLKIN )
/* Configure 5910 pins functions to match our board. */
ldr r0, MUX_CONFIG_BASE
mov r0, #0x4000
sdelay:
subs r0, r0, #0x1
- bne sdelay
+ bne sdelay
/* back to arch calling code */
mov pc, lr