* Copyright 1999 The Puffin Group, (Alex deVries, David Kennedy)
* Copyright 2003 Grant Grundler <grundler parisc-linux org>
* Copyright 2003,2004 Ryan Bradetich <rbrad@parisc-linux.org>
+ * Copyright 2004 Thibaut VARENE <varenet@parisc-linux.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
#include <asm/system.h>
#include <asm/processor.h> /* for boot_cpu_data */
-static spinlock_t pdc_lock = SPIN_LOCK_UNLOCKED;
+static DEFINE_SPINLOCK(pdc_lock);
static unsigned long pdc_result[32] __attribute__ ((aligned (8)));
static unsigned long pdc_result2[32] __attribute__ ((aligned (8)));
}
EXPORT_SYMBOL(pdc_lan_station_id);
+/**
+ * pdc_stable_read - Read data from Stable Storage.
+ * @staddr: Stable Storage address to access.
+ * @memaddr: The memory address where Stable Storage data shall be copied.
+ * @count: number of bytes to transfert. count is multiple of 4.
+ *
+ * This PDC call reads from the Stable Storage address supplied in staddr
+ * and copies count bytes to the memory address memaddr.
+ * The call will fail if staddr+count > PDC_STABLE size.
+ */
+int pdc_stable_read(unsigned long staddr, void *memaddr, unsigned long count)
+{
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_READ, staddr,
+ __pa(pdc_result), count);
+ convert_to_wide(pdc_result);
+ memcpy(memaddr, pdc_result, count);
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(pdc_stable_read);
+
+/**
+ * pdc_stable_write - Write data to Stable Storage.
+ * @staddr: Stable Storage address to access.
+ * @memaddr: The memory address where Stable Storage data shall be read from.
+ * @count: number of bytes to transfert. count is multiple of 4.
+ *
+ * This PDC call reads count bytes from the supplied memaddr address,
+ * and copies count bytes to the Stable Storage address staddr.
+ * The call will fail if staddr+count > PDC_STABLE size.
+ */
+int pdc_stable_write(unsigned long staddr, void *memaddr, unsigned long count)
+{
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ memcpy(pdc_result, memaddr, count);
+ convert_to_wide(pdc_result);
+ retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_WRITE, staddr,
+ __pa(pdc_result), count);
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(pdc_stable_write);
+
+/**
+ * pdc_stable_get_size - Get Stable Storage size in bytes.
+ * @size: pointer where the size will be stored.
+ *
+ * This PDC call returns the number of bytes in the processor's Stable
+ * Storage, which is the number of contiguous bytes implemented in Stable
+ * Storage starting from staddr=0. size in an unsigned 64-bit integer
+ * which is a multiple of four.
+ */
+int pdc_stable_get_size(unsigned long *size)
+{
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_RETURN_SIZE, __pa(pdc_result));
+ *size = pdc_result[0];
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(pdc_stable_get_size);
+
+/**
+ * pdc_stable_verify_contents - Checks that Stable Storage contents are valid.
+ *
+ * This PDC call is meant to be used to check the integrity of the current
+ * contents of Stable Storage.
+ */
+int pdc_stable_verify_contents(void)
+{
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_VERIFY_CONTENTS);
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(pdc_stable_verify_contents);
+
+/**
+ * pdc_stable_initialize - Sets Stable Storage contents to zero and initialize
+ * the validity indicator.
+ *
+ * This PDC call will erase all contents of Stable Storage. Use with care!
+ */
+int pdc_stable_initialize(void)
+{
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_STABLE, PDC_STABLE_INITIALIZE);
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
+EXPORT_SYMBOL(pdc_stable_initialize);
/**
* pdc_get_initiator - Get the SCSI Interface Card params (SCSI ID, SDTR, SE or LVD)
* @hwpath: fully bc.mod style path to the device.
- * @scsi_id: what someone told firmware the ID should be.
- * @period: time in cycles
- * @width: 8 or 16-bit wide bus
- * @mode: 0,1,2 -> SE,HVD,LVD signalling mode
+ * @initiator: the array to return the result into
*
* Get the SCSI operational parameters from PDC.
* Needed since HPUX never used BIOS or symbios card NVRAM.
* o cable too long (ie SE scsi 10Mhz won't support 6m length),
* o bus width exported is less than what the interface chip supports.
*/
-int pdc_get_initiator(struct hardware_path *hwpath, unsigned char *scsi_id,
- unsigned long *period, char *width, char *mode)
+int pdc_get_initiator(struct hardware_path *hwpath, struct pdc_initiator *initiator)
{
int retval;
retval = mem_pdc_call(PDC_INITIATOR, PDC_GET_INITIATOR,
__pa(pdc_result), __pa(hwpath));
-
if (retval < PDC_OK)
- goto fail;
-
- *scsi_id = (unsigned char) pdc_result[0];
+ goto out;
- /* convert Bus speed in Mhz to period (in 1/10 ns) */
- switch (pdc_result[1]) {
- /*
- * case 0: driver determines rate
- * case -1: Settings are uninitialized.
- */
- case 5: *period = 2000; break;
- case 10: *period = 1000; break;
- case 20: *period = 500; break;
- case 40: *period = 250; break;
- case 80: *period = 125; break;
- default: /* Do nothing */ break;
+ if (pdc_result[0] < 16) {
+ initiator->host_id = pdc_result[0];
+ } else {
+ initiator->host_id = -1;
}
- /*
- * pdc_result[2] PDC suggested SCSI id
- * pdc_result[3] PDC suggested SCSI rate
+ /*
+ * Sprockets and Piranha return 20 or 40 (MT/s). Prelude returns
+ * 1, 2, 5 or 10 for 5, 10, 20 or 40 MT/s, respectively
*/
+ switch (pdc_result[1]) {
+ case 1: initiator->factor = 50; break;
+ case 2: initiator->factor = 25; break;
+ case 5: initiator->factor = 12; break;
+ case 25: initiator->factor = 10; break;
+ case 20: initiator->factor = 12; break;
+ case 40: initiator->factor = 10; break;
+ default: initiator->factor = -1; break;
+ }
if (IS_SPROCKETS()) {
- /* 0 == 8-bit, 1 == 16-bit */
- *width = (char) pdc_result[4];
-
- /* ...in case someone needs it in the future.
- * sym53c8xx.c comments say it can't autodetect
- * for 825/825A/875 chips.
- * 0 == SE, 1 == HVD, 2 == LVD
- */
- *mode = (char) pdc_result[5];
+ initiator->width = pdc_result[4];
+ initiator->mode = pdc_result[5];
+ } else {
+ initiator->width = -1;
+ initiator->mode = -1;
}
- fail:
+ out:
spin_unlock_irq(&pdc_lock);
return (retval >= PDC_OK);
}
long real64_call(unsigned long fn, ...)
{
va_list args;
- extern struct wide_stack real64_stack __attribute__ ((alias ("real_stack")));
+ extern struct wide_stack real64_stack;
extern unsigned long real64_call_asm(unsigned long *,
unsigned long *,
unsigned long);
git://git.onelab.eu / linux-2.6.git / blobdiff