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[ARM] 4184/1: iop: cp6 access handler (undef_hook)

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Enable svc access to cp6 via an undefined instruction hook.  Do not enable
access for usr code.

This patch also makes iop13xx select PLAT_IOP, this requires a small change
to drivers/i2c/busses/i2c-iop3xx.c.

Per Lennert Buytenhek's note, the cp6 trap routine is moved to arch/arm/plat-iop
Per Nicolas Pitre's note, the cp_wait is skipped since the latency to
return to the faulting function is longer than cp_wait.

Signed-off-by: Dan Williams <[email protected]>
Signed-off-by: Russell King <[email protected]>
This commit is contained in:
Dan Williams 2007-02-13 17:12:04 +01:00 • committed by Russell King
commit 588ef76935
8 changed files with 87 additions and 5 deletions
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2
drivers/i2c/busses/i2c-iop3xx.c
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@ -84,7 +84,7 @@ iop3xx_i2c_enable(struct i2c_algo_iop3xx_data *iop3xx_adap)
* Every time unit enable is asserted, GPOD needs to be cleared
* on IOP3XX to avoid data corruption on the bus.
*/
#ifdef CONFIG_PLAT_IOP
#if defined(CONFIG_ARCH_IOP32X) || defined(CONFIG_ARCH_IOP33X)
if (iop3xx_adap->id == 0) {
gpio_line_set(IOP3XX_GPIO_LINE(7), GPIO_LOW);
gpio_line_set(IOP3XX_GPIO_LINE(6), GPIO_LOW);