* Copyright 1999 SuSE GmbH Nuernberg (Philipp Rumpf, prumpf@tux.org)
* 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>
*
* 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/page.h>
#include <asm/pdc.h>
+#include <asm/pdcpat.h>
#include <asm/system.h>
#include <asm/processor.h> /* for boot_cpu_data */
static unsigned long pdc_result[32] __attribute__ ((aligned (8)));
static unsigned long pdc_result2[32] __attribute__ ((aligned (8)));
+#ifdef __LP64__
+#define WIDE_FIRMWARE 0x1
+#define NARROW_FIRMWARE 0x2
+
+/* Firmware needs to be initially set to narrow to determine the
+ * actual firmware width. */
+int parisc_narrow_firmware = 1;
+#endif
+
/* on all currently-supported platforms, IODC I/O calls are always
* 32-bit calls, and MEM_PDC calls are always the same width as the OS.
* This means Cxxx boxes can't run wide kernels right now. -PB
#endif
long real32_call(unsigned long function, ...);
-#if defined(__LP64__) && ! defined(CONFIG_PDC_NARROW)
-#define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
-# define mem_pdc_call(args...) real64_call(MEM_PDC, args)
+#ifdef __LP64__
+# define MEM_PDC (unsigned long)(PAGE0->mem_pdc_hi) << 32 | PAGE0->mem_pdc
+# define mem_pdc_call(args...) unlikely(parisc_narrow_firmware) ? real32_call(MEM_PDC, args) : real64_call(MEM_PDC, args)
#else
-#define MEM_PDC (unsigned long)PAGE0->mem_pdc
+# define MEM_PDC (unsigned long)PAGE0->mem_pdc
# define mem_pdc_call(args...) real32_call(MEM_PDC, args)
#endif
*/
static unsigned long f_extend(unsigned long address)
{
-#ifdef CONFIG_PDC_NARROW
- if((address & 0xff000000) == 0xf0000000)
- return 0xf0f0f0f000000000 | (u32)address;
+#ifdef __LP64__
+ if(unlikely(parisc_narrow_firmware)) {
+ if((address & 0xff000000) == 0xf0000000)
+ return 0xf0f0f0f000000000 | (u32)address;
- if((address & 0xf0000000) == 0xf0000000)
- return 0xffffffff00000000 | (u32)address;
+ if((address & 0xf0000000) == 0xf0000000)
+ return 0xffffffff00000000 | (u32)address;
+ }
#endif
return address;
}
*/
static void convert_to_wide(unsigned long *addr)
{
-#ifdef CONFIG_PDC_NARROW
+#ifdef __LP64__
int i;
- unsigned *p = (unsigned int *)addr;
- for(i = 31; i >= 0; --i)
- addr[i] = p[i];
+ unsigned int *p = (unsigned int *)addr;
+
+ if(unlikely(parisc_narrow_firmware)) {
+ for(i = 31; i >= 0; --i)
+ addr[i] = p[i];
+ }
+#endif
+}
+
+/**
+ * set_firmware_width - Determine if the firmware is wide or narrow.
+ *
+ * This function must be called before any pdc_* function that uses the convert_to_wide
+ * function.
+ */
+void __init set_firmware_width(void)
+{
+#ifdef __LP64__
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_MODEL, PDC_MODEL_CAPABILITIES, __pa(pdc_result), 0);
+ convert_to_wide(pdc_result);
+ if(pdc_result[0] != NARROW_FIRMWARE)
+ parisc_narrow_firmware = 0;
+ spin_unlock_irq(&pdc_lock);
#endif
}
*/
void pdc_emergency_unlock(void)
{
- spin_unlock(&pdc_lock);
+ /* Spinlock DEBUG code freaks out if we unconditionally unlock */
+ if (spin_is_locked(&pdc_lock))
+ spin_unlock(&pdc_lock);
}
#ifdef __LP64__
int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
{
+ int retval = 0;
+
if (!is_pdc_pat())
return -1;
- int retval = 0;
-
spin_lock_irq(&pdc_lock);
retval = mem_pdc_call(PDC_PAT_CHASSIS_LOG, PDC_PAT_CHASSIS_WRITE_LOG, __pa(&state), __pa(&data));
spin_unlock_irq(&pdc_lock);
case 10: *period = 1000; break;
case 20: *period = 500; break;
case 40: *period = 250; break;
+ case 80: *period = 125; break;
default: /* Do nothing */ break;
}
return retval;
}
+
+/**
+ * pdc_pat_io_pci_cfg_read - Read PCI configuration space.
+ * @pci_addr: PCI configuration space address for which the read request is being made.
+ * @pci_size: Size of read in bytes. Valid values are 1, 2, and 4.
+ * @mem_addr: Pointer to return memory buffer.
+ *
+ */
+int pdc_pat_io_pci_cfg_read(unsigned long pci_addr, int pci_size, u32 *mem_addr)
+{
+ int retval;
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_READ,
+ __pa(pdc_result), pci_addr, pci_size);
+ switch(pci_size) {
+ case 1: *(u8 *) mem_addr = (u8) pdc_result[0];
+ case 2: *(u16 *)mem_addr = (u16) pdc_result[0];
+ case 4: *(u32 *)mem_addr = (u32) pdc_result[0];
+ }
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
+
+/**
+ * pdc_pat_io_pci_cfg_write - Retrieve information about memory address ranges.
+ * @pci_addr: PCI configuration space address for which the write request is being made.
+ * @pci_size: Size of write in bytes. Valid values are 1, 2, and 4.
+ * @value: Pointer to 1, 2, or 4 byte value in low order end of argument to be
+ * written to PCI Config space.
+ *
+ */
+int pdc_pat_io_pci_cfg_write(unsigned long pci_addr, int pci_size, u32 val)
+{
+ int retval;
+
+ spin_lock_irq(&pdc_lock);
+ retval = mem_pdc_call(PDC_PAT_IO, PDC_PAT_IO_PCI_CONFIG_WRITE,
+ pci_addr, pci_size, val);
+ spin_unlock_irq(&pdc_lock);
+
+ return retval;
+}
#endif /* __LP64__ */
long real64_call(unsigned long fn, ...)
{
va_list args;
- extern struct wide_stack real_stack;
+ extern struct wide_stack real64_stack __attribute__ ((alias ("real_stack")));
extern unsigned long real64_call_asm(unsigned long *,
unsigned long *,
unsigned long);
va_start(args, fn);
- real_stack.arg0 = va_arg(args, unsigned long);
- real_stack.arg1 = va_arg(args, unsigned long);
- real_stack.arg2 = va_arg(args, unsigned long);
- real_stack.arg3 = va_arg(args, unsigned long);
- real_stack.arg4 = va_arg(args, unsigned long);
- real_stack.arg5 = va_arg(args, unsigned long);
- real_stack.arg6 = va_arg(args, unsigned long);
- real_stack.arg7 = va_arg(args, unsigned long);
- real_stack.arg8 = va_arg(args, unsigned long);
- real_stack.arg9 = va_arg(args, unsigned long);
- real_stack.arg10 = va_arg(args, unsigned long);
- real_stack.arg11 = va_arg(args, unsigned long);
- real_stack.arg12 = va_arg(args, unsigned long);
- real_stack.arg13 = va_arg(args, unsigned long);
+ real64_stack.arg0 = va_arg(args, unsigned long);
+ real64_stack.arg1 = va_arg(args, unsigned long);
+ real64_stack.arg2 = va_arg(args, unsigned long);
+ real64_stack.arg3 = va_arg(args, unsigned long);
+ real64_stack.arg4 = va_arg(args, unsigned long);
+ real64_stack.arg5 = va_arg(args, unsigned long);
+ real64_stack.arg6 = va_arg(args, unsigned long);
+ real64_stack.arg7 = va_arg(args, unsigned long);
+ real64_stack.arg8 = va_arg(args, unsigned long);
+ real64_stack.arg9 = va_arg(args, unsigned long);
+ real64_stack.arg10 = va_arg(args, unsigned long);
+ real64_stack.arg11 = va_arg(args, unsigned long);
+ real64_stack.arg12 = va_arg(args, unsigned long);
+ real64_stack.arg13 = va_arg(args, unsigned long);
va_end(args);
- return real64_call_asm(&real_stack.sp, &real_stack.arg0, fn);
+ return real64_call_asm(&real64_stack.sp, &real64_stack.arg0, fn);
}
#endif /* __LP64__ */
git://git.onelab.eu / linux-2.6.git / blobdiff