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arch/tile: Enable more sophisticated IRQ model for 32-bit chips.

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This model is based on the on-chip interrupt model used by the
TILE-Gx next-generation hardware, and interacts much more cleanly
with the Linux generic IRQ layer.

The change includes modifications to the Tilera hypervisor, which
are reflected in the hypervisor headers in arch/tile/include/arch/.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Chris Metcalf
2010-06-25 16:41:11 -04:00
parent de5d9bf654
commit fb702b942b
9 changed files with 438 additions and 157 deletions
Download Patch File Download Diff File Expand all files Collapse all files

119
arch/tile/include/hv/hypervisor.h
View File

@@ -20,12 +20,9 @@
#ifndef _TILE_HV_H
#define _TILE_HV_H
#ifdef __tile__
#include <arch/chip.h>
#else
/* HACK: Allow use by "tools/cpack/". */
#include "install/include/arch/chip.h"
#endif
#include <hv/pagesize.h>
/* Linux builds want unsigned long constants, but assembler wants numbers */
#ifdef __ASSEMBLER__
@@ -39,7 +36,6 @@
#define __HV_SIZE_ONE 1UL
#endif
/** The log2 of the span of a level-1 page table, in bytes.
*/
#define HV_LOG2_L1_SPAN 32
@@ -48,21 +44,11 @@
*/
#define HV_L1_SPAN (__HV_SIZE_ONE << HV_LOG2_L1_SPAN)
/** The log2 of the size of small pages, in bytes. This value should
* be verified at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_SMALL).
*/
#define HV_LOG2_PAGE_SIZE_SMALL 16
/** The size of small pages, in bytes. This value should be verified
* at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_SMALL).
*/
#define HV_PAGE_SIZE_SMALL (__HV_SIZE_ONE << HV_LOG2_PAGE_SIZE_SMALL)
/** The log2 of the size of large pages, in bytes. This value should be
* verified at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_LARGE).
*/
#define HV_LOG2_PAGE_SIZE_LARGE 24
/** The size of large pages, in bytes. This value should be verified
* at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_LARGE).
*/
@@ -93,7 +79,7 @@
#define HV_DISPATCH_ENTRY_SIZE 32
/** Version of the hypervisor interface defined by this file */
#define _HV_VERSION 10
#define _HV_VERSION 11
/* Index into hypervisor interface dispatch code blocks.
*
@@ -253,8 +239,10 @@
/** hv_set_command_line */
#define HV_DISPATCH_SET_COMMAND_LINE 47
/** hv_dev_register_intr_state */
#define HV_DISPATCH_DEV_REGISTER_INTR_STATE 48
#if !CHIP_HAS_IPI()
/** hv_clear_intr */
#define HV_DISPATCH_CLEAR_INTR 48
/** hv_enable_intr */
#define HV_DISPATCH_ENABLE_INTR 49
@@ -262,20 +250,30 @@
/** hv_disable_intr */
#define HV_DISPATCH_DISABLE_INTR 50
/** hv_raise_intr */
#define HV_DISPATCH_RAISE_INTR 51
/** hv_trigger_ipi */
#define HV_DISPATCH_TRIGGER_IPI 51
#define HV_DISPATCH_TRIGGER_IPI 52
#endif /* !CHIP_HAS_IPI() */
/** hv_store_mapping */
#define HV_DISPATCH_STORE_MAPPING 52
#define HV_DISPATCH_STORE_MAPPING 53
/** hv_inquire_realpa */
#define HV_DISPATCH_INQUIRE_REALPA 53
#define HV_DISPATCH_INQUIRE_REALPA 54
/** hv_flush_all */
#define HV_DISPATCH_FLUSH_ALL 54
#define HV_DISPATCH_FLUSH_ALL 55
#if CHIP_HAS_IPI()
/** hv_get_ipi_pte */
#define HV_DISPATCH_GET_IPI_PTE 56
#endif
/** One more than the largest dispatch value */
#define _HV_DISPATCH_END 55
#define _HV_DISPATCH_END 57
#ifndef __ASSEMBLER__
@@ -484,21 +482,6 @@ typedef enum {
*/
int hv_confstr(HV_ConfstrQuery query, HV_VirtAddr buf, int len);
/** State object used to enable and disable one-shot and level-sensitive
* interrupts. */
typedef struct
{
#if CHIP_VA_WIDTH() > 32
__hv64 opaque[2]; /**< No user-serviceable parts inside */
#else
__hv32 opaque[2]; /**< No user-serviceable parts inside */
#endif
}
HV_IntrState;
/** A set of interrupts. */
typedef __hv32 HV_IntrMask;
/** Tile coordinate */
typedef struct
{
@@ -509,34 +492,51 @@ typedef struct
int y;
} HV_Coord;
#if CHIP_HAS_IPI()
/** Get the PTE for sending an IPI to a particular tile.
*
* @param tile Tile which will receive the IPI.
* @param pl Indicates which IPI registers: 0 = IPI_0, 1 = IPI_1.
* @param pte Filled with resulting PTE.
* @result Zero if no error, non-zero for invalid parameters.
*/
int hv_get_ipi_pte(HV_Coord tile, int pl, HV_PTE* pte);
#else /* !CHIP_HAS_IPI() */
/** A set of interrupts. */
typedef __hv32 HV_IntrMask;
/** The low interrupt numbers are reserved for use by the client in
* delivering IPIs. Any interrupt numbers higher than this value are
* reserved for use by HV device drivers. */
#define HV_MAX_IPI_INTERRUPT 7
/** Register an interrupt state object. This object is used to enable and
* disable one-shot and level-sensitive interrupts. Once the state is
* registered, the client must not read or write the state object; doing
* so will cause undefined results.
/** Enable a set of device interrupts.
*
* @param intr_state Pointer to interrupt state object.
* @return HV_OK on success, or a hypervisor error code.
*/
HV_Errno hv_dev_register_intr_state(HV_IntrState* intr_state);
/** Enable a set of one-shot and level-sensitive interrupts.
*
* @param intr_state Pointer to interrupt state object.
* @param enab_mask Bitmap of interrupts to enable.
*/
void hv_enable_intr(HV_IntrState* intr_state, HV_IntrMask enab_mask);
void hv_enable_intr(HV_IntrMask enab_mask);
/** Disable a set of one-shot and level-sensitive interrupts.
/** Disable a set of device interrupts.
*
* @param intr_state Pointer to interrupt state object.
* @param disab_mask Bitmap of interrupts to disable.
*/
void hv_disable_intr(HV_IntrState* intr_state, HV_IntrMask disab_mask);
void hv_disable_intr(HV_IntrMask disab_mask);
/** Clear a set of device interrupts.
*
* @param clear_mask Bitmap of interrupts to clear.
*/
void hv_clear_intr(HV_IntrMask clear_mask);
/** Assert a set of device interrupts.
*
* @param assert_mask Bitmap of interrupts to clear.
*/
void hv_assert_intr(HV_IntrMask assert_mask);
/** Trigger a one-shot interrupt on some tile
*
@@ -547,6 +547,8 @@ void hv_disable_intr(HV_IntrState* intr_state, HV_IntrMask disab_mask);
*/
HV_Errno hv_trigger_ipi(HV_Coord tile, int interrupt);
#endif // !CHIP_HAS_IPI()
/** Store memory mapping in debug memory so that external debugger can read it.
* A maximum of 16 entries can be stored.
*
@@ -1010,6 +1012,13 @@ int hv_console_write(HV_VirtAddr bytes, int len);
* it will return to the code which was interrupted by the INTCTRL_1
* interrupt.
*
* Under some circumstances, the firing of INTCTRL_1 can race with
* the lowering of a device interrupt. In such a case, the
* hv_downcall_dispatch service may issue an iret instruction instead
* of entering one of the client's actual downcall-handling interrupt
* vectors. This will return execution to the location that was
* interrupted by INTCTRL_1.
*
* Any saving of registers should be done by the actual handling
* vectors; no registers should be changed by the INTCTRL_1 handler.
* In particular, the client should not use a jal instruction to invoke

32
arch/tile/include/hv/pagesize.h Normal file
View File

@@ -0,0 +1,32 @@
/*
* Copyright 2010 Tilera Corporation. All Rights Reserved.
*
* 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 the Free Software Foundation, version 2.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for
* more details.
*/
/**
* @file pagesize.h
*/
#ifndef _HV_PAGESIZE_H
#define _HV_PAGESIZE_H
/** The log2 of the size of small pages, in bytes. This value should
* be verified at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_SMALL).
*/
#define HV_LOG2_PAGE_SIZE_SMALL 16
/** The log2 of the size of large pages, in bytes. This value should be
* verified at runtime by calling hv_sysconf(HV_SYSCONF_PAGE_SIZE_LARGE).
*/
#define HV_LOG2_PAGE_SIZE_LARGE 24
#endif /* _HV_PAGESIZE_H */