Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...

[linux-2.6.git] / arch / parisc / kernel / firmware.c

diff --git a/arch/parisc/kernel/firmware.c b/arch/parisc/kernel/firmware.c
index e8b722d..4398d2a 100644 (file)
--- a/arch/parisc/kernel/firmware.c
+++ b/arch/parisc/kernel/firmware.c
@@ -11,7 +11,7 @@
  * 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>
+ * Copyright 2004,2006 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
@@ -80,18 +80,18 @@ static unsigned long pdc_result2[32] __attribute__ ((aligned (8)));
 
 /* Firmware needs to be initially set to narrow to determine the 
  * actual firmware width. */
-int parisc_narrow_firmware = 1;
+int parisc_narrow_firmware __read_mostly = 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
+/* On most currently-supported platforms, IODC I/O calls are 32-bit calls
+ * and MEM_PDC calls are always the same width as the OS.
+ * Some PAT boxes may have 64-bit IODC I/O.
  *
- * CONFIG_PDC_NARROW has been added to allow 64-bit kernels to run on
- * systems with 32-bit MEM_PDC calls. This will allow wide kernels to
- * run on Cxxx boxes now. -RB
- *
- * Note that some PAT boxes may have 64-bit IODC I/O...
+ * Ryan Bradetich added the now obsolete CONFIG_PDC_NARROW to allow
+ * 64-bit kernels to run on systems with 32-bit MEM_PDC calls.
+ * This allowed wide kernels to run on Cxxx boxes.
+ * We now detect 32-bit-only PDC and dynamically switch to 32-bit mode
+ * when running a 64-bit kernel on such boxes (e.g. C200 or C360).
  */
 
 #ifdef __LP64__
@@ -120,10 +120,10 @@ static unsigned long f_extend(unsigned long address)
 #ifdef __LP64__
        if(unlikely(parisc_narrow_firmware)) {
                if((address & 0xff000000) == 0xf0000000)
-                       return 0xf0f0f0f000000000 | (u32)address;
+                       return 0xf0f0f0f000000000UL | (u32)address;
 
                if((address & 0xf0000000) == 0xf0000000)
-                       return 0xffffffff00000000 | (u32)address;
+                       return 0xffffffff00000000UL | (u32)address;
        }
 #endif
        return address;
@@ -252,10 +252,8 @@ int pdc_pat_chassis_send_log(unsigned long state, unsigned long data)
 #endif
 
 /**
- * pdc_chassis_disp - Updates display
+ * pdc_chassis_disp - Updates chassis code
  * @retval: -1 on error, 0 on success
- *
- * Works on old PDC only (E class, others?)
  */
 int pdc_chassis_disp(unsigned long disp)
 {
@@ -268,6 +266,22 @@ int pdc_chassis_disp(unsigned long disp)
        return retval;
 }
 
+/**
+ * pdc_chassis_warn - Fetches chassis warnings
+ * @retval: -1 on error, 0 on success
+ */
+int pdc_chassis_warn(unsigned long *warn)
+{
+       int retval = 0;
+
+       spin_lock_irq(&pdc_lock);
+       retval = mem_pdc_call(PDC_CHASSIS, PDC_CHASSIS_WARN, __pa(pdc_result));
+       *warn = pdc_result[0];
+       spin_unlock_irq(&pdc_lock);
+
+       return retval;
+}
+
 /**
  * pdc_coproc_cfg - To identify coprocessors attached to the processor.
  * @pdc_coproc_info: Return buffer address.
@@ -393,7 +407,9 @@ int pdc_model_info(struct pdc_model *model)
  * pdc_model_sysmodel - Get the system model name.
  * @name: A char array of at least 81 characters.
  *
- * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L)
+ * Get system model name from PDC ROM (e.g. 9000/715 or 9000/778/B160L).
+ * Using OS_ID_HPUX will return the equivalent of the 'modelname' command
+ * on HP/UX.
  */
 int pdc_model_sysmodel(char *name)
 {
@@ -498,6 +514,26 @@ int pdc_cache_info(struct pdc_cache_info *cache_info)
         return retval;
 }
 
+/**
+ * pdc_spaceid_bits - Return whether Space ID hashing is turned on.
+ * @space_bits: Should be 0, if not, bad mojo!
+ *
+ * Returns information about Space ID hashing.
+ */
+int pdc_spaceid_bits(unsigned long *space_bits)
+{
+       int retval;
+
+       spin_lock_irq(&pdc_lock);
+       pdc_result[0] = 0;
+       retval = mem_pdc_call(PDC_CACHE, PDC_CACHE_RET_SPID, __pa(pdc_result), 0);
+       convert_to_wide(pdc_result);
+       *space_bits = pdc_result[0];
+       spin_unlock_irq(&pdc_lock);
+
+       return retval;
+}
+
 #ifndef CONFIG_PA20
 /**
  * pdc_btlb_info - Return block TLB information.
@@ -782,6 +818,8 @@ int pdc_pci_irt(unsigned long num_entries, unsigned long hpa, void *tbl)
 {
        int retval;
 
+       BUG_ON((unsigned long)tbl & 0x7);
+
        spin_lock_irq(&pdc_lock);
        pdc_result[0] = num_entries;
        retval = mem_pdc_call(PDC_PCI_INDEX, PDC_PCI_GET_INT_TBL, 
@@ -912,7 +950,7 @@ int pdc_do_firm_test_reset(unsigned long ftc_bitmap)
  *
  * Reset the system.
  */
-int pdc_do_reset()
+int pdc_do_reset(void)
 {
         int retval;