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From: David Howells <dhowells@redhat.com>
To: linux-am33-list@redhat.com
Cc: linux-kernel@vger.kernel.org, Mark Salter <msalter@redhat.com>
Subject: [PATCH 38/43] MN10300: Specify an ELF HWCAP flag for MN10300 Atomic Operations Unit support
Date: Tue, 26 Oct 2010 03:56:24 +0100	[thread overview]
Message-ID: <20101026025624.23512.27873.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <20101026025301.23512.24525.stgit@warthog.procyon.org.uk>

From: Mark Salter <msalter@redhat.com>

Use an ELF HWCAP flag to indicate to the process that the CPU provides LL/SC
equivalent atomic operations unit support in addition to BSET/BCLR.

Signed-off-by: Mark Salter <msalter@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
---

 arch/mn10300/include/asm/elf.h |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)


diff --git a/arch/mn10300/include/asm/elf.h b/arch/mn10300/include/asm/elf.h
index a30d220..8157c92 100644
--- a/arch/mn10300/include/asm/elf.h
+++ b/arch/mn10300/include/asm/elf.h
@@ -32,6 +32,12 @@
 #define R_MN10300_ALIGN 	34	/* Alignment requirement. */
 
 /*
+ * AM33/AM34 HW Capabilities
+ */
+#define HWCAP_MN10300_ATOMIC_OP_UNIT	1	/* Has AM34 Atomic Operations */
+
+
+/*
  * ELF register definitions..
  */
 typedef unsigned long elf_greg_t;
@@ -128,7 +134,11 @@ do {						\
  * instruction set this CPU supports.  This could be done in user space,
  * but it's not easy, and we've already done it here.
  */
+#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT
+#define ELF_HWCAP	(HWCAP_MN10300_ATOMIC_OP_UNIT)
+#else
 #define ELF_HWCAP	(0)
+#endif
 
 /*
  * This yields a string that ld.so will use to load implementation


  parent reply	other threads:[~2010-10-26  2:57 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-10-26  2:53 [PATCH 00/43] MN10300: Add SMP support and AM34 CPU core support David Howells
2010-10-26  2:53 ` [PATCH 01/43] Partially revert patch that encloses asm-offset.h numbers in brackets David Howells
2010-10-26  2:53 ` [PATCH 02/43] MN10300: BUG to BUG_ON changes David Howells
2010-10-26  2:53 ` [PATCH 03/43] bitops: Change the bitmap index from int to unsigned long [mn10300] David Howells
2010-10-26  2:53 ` [PATCH 04/43] mn10300: Use pci_claim_resource David Howells
2010-10-26  2:53 ` [PATCH 05/43] MN10300: Prevent cnt32_to_63() from being preempted in sched_clock() David Howells
2010-10-26  2:53 ` [PATCH 06/43] Typedef SMP call function pointer David Howells
2010-10-26  2:53 ` [PATCH 07/43] MN10300: Don't cast away the volatile in test_bit() David Howells
2010-10-26  2:53 ` [PATCH 08/43] MN10300: Add reads[bwl]() and writes[bwl]() David Howells
2010-10-26  2:53 ` [PATCH 09/43] MN10300: Provide the functions to fully disable maskable interrupts David Howells
2010-10-26  2:53 ` [PATCH 10/43] MN10300: Differentiate AM33_2 and AM33_3 in config David Howells
2010-10-26  2:54 ` [PATCH 11/43] MN10300: Move DMA engine control reg defs to MN103E010 processor directory David Howells
2010-10-26  2:54 ` [PATCH 12/43] MN10300: Don't hard code the cacheline size in register defs David Howells
2010-10-26  2:54 ` [PATCH 13/43] MN10300: Add CPU register bits for AM34 David Howells
2010-10-26  2:54 ` [PATCH 14/43] MN10300: Remove monitor/JTAG functions David Howells
2010-10-26  2:54 ` [PATCH 15/43] MN10300: Cache: Split cache bits out of arch Kconfig David Howells
2010-10-26  2:54 ` [PATCH 16/43] MN10300: Provide a MN10300_CACHE_ENABLED config option David Howells
2010-10-26  2:54 ` [PATCH 17/43] MN10300: Reorder asm/cacheflush.h to put primitives first David Howells
2010-10-26  2:54 ` [PATCH 18/43] MN10300: AM34: The current cacheflush routines operate by controlling tag regs David Howells
2010-10-26  2:54 ` [PATCH 19/43] MN10300: Cacheflush functions should take unsigned long addresses David Howells
2010-10-26  2:54 ` [PATCH 20/43] MN10300: SMP: Differentiate local cache flushing David Howells
2010-10-26  2:54 ` [PATCH 21/43] MN10300: AM34: Add cacheflushing by using the AM34 purge registers David Howells
2010-10-26  2:54 ` [PATCH 22/43] MN10300: Allow some cacheflushes to be avoided if cache snooping is available David Howells
2010-10-26  2:55 ` [PATCH 23/43] MN10300: Cache: Implement SMP global cache flushing David Howells
2010-10-26  2:55 ` [PATCH 24/43] MN10300: Make the boot wrapper able to use writeback caching David Howells
2010-10-26  2:55 ` [PATCH 25/43] MN10300: AM34 erratum requires MMUCTR read and write on exception entry David Howells
2010-10-26  2:55 ` [PATCH 26/43] MN10300: Rename __flush_tlb*() to local_flush_tlb*() David Howells
2010-10-26  2:55 ` [PATCH 27/43] MN10300: Make the use of PIDR to mark TLB entries controllable David Howells
2010-10-26  2:55 ` [PATCH 28/43] MN10300: Use the [ID]PTEL2 registers rather than [ID]PTEL for TLB control David Howells
2010-10-26  2:55 ` [PATCH 29/43] MN10300: SMP TLB flushing David Howells
2010-10-26  2:55 ` [PATCH 30/43] MN10300: Make the FPU operate in non-lazy mode under SMP David Howells
2010-10-26  2:55 ` [PATCH 31/43] MN10300: Implement atomic ops using atomic ops unit David Howells
2010-10-26  2:55 ` [PATCH 32/43] MN10300: Optimise do_csum() David Howells
2010-10-26  2:55 ` [PATCH 33/43] MN10300: Make various interrupt priority settings configurable David Howells
2010-10-26  2:56 ` [PATCH 34/43] MN10300: Delete idle_timestamp from irq_cpustat_t David Howells
2010-10-26  2:56 ` [PATCH 35/43] MN10300: And Panasonic AM34 subarch and implement SMP David Howells
2010-10-27 13:31   ` [Linux-am33-list] " Suzuki Takashi
2010-10-27 14:33   ` David Howells
2010-10-26  2:56 ` [PATCH 36/43] MN10300: ASB2364: Add support for SMSC911X and SMC911X David Howells
2010-10-26  2:56 ` [PATCH 37/43] MN10300: Map userspace atomic op regs as a vmalloc page David Howells
2010-10-26  2:56 ` David Howells [this message]
2010-10-26  2:56 ` [PATCH 39/43] MN10300: Generic time support David Howells
2010-10-26  2:56 ` [PATCH 40/43] MN10300: Update the ASB2303 defconfig David Howells
2010-10-26  2:56 ` [PATCH 41/43] MN10300: Create a defconfig for the ASB2364 board David Howells
2010-10-26  2:56 ` [PATCH 42/43] MN10300: Change "Matsushita" to "Panasonic" David Howells
2010-10-26  2:56 ` [PATCH 43/43] MN10300: Save frame pointer in thread_info struct rather than global var David Howells
2010-10-26  3:07 ` [PATCH 00/43] MN10300: Add SMP support and AM34 CPU core support David Howells

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