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https://github.com/edk2-porting/linux-next.git
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df9ee29270
Fix the IRQ flag handling naming. In linux/irqflags.h under one configuration, it maps: local_irq_enable() -> raw_local_irq_enable() local_irq_disable() -> raw_local_irq_disable() local_irq_save() -> raw_local_irq_save() ... and under the other configuration, it maps: raw_local_irq_enable() -> local_irq_enable() raw_local_irq_disable() -> local_irq_disable() raw_local_irq_save() -> local_irq_save() ... This is quite confusing. There should be one set of names expected of the arch, and this should be wrapped to give another set of names that are expected by users of this facility. Change this to have the arch provide: flags = arch_local_save_flags() flags = arch_local_irq_save() arch_local_irq_restore(flags) arch_local_irq_disable() arch_local_irq_enable() arch_irqs_disabled_flags(flags) arch_irqs_disabled() arch_safe_halt() Then linux/irqflags.h wraps these to provide: raw_local_save_flags(flags) raw_local_irq_save(flags) raw_local_irq_restore(flags) raw_local_irq_disable() raw_local_irq_enable() raw_irqs_disabled_flags(flags) raw_irqs_disabled() raw_safe_halt() with type checking on the flags 'arguments', and then wraps those to provide: local_save_flags(flags) local_irq_save(flags) local_irq_restore(flags) local_irq_disable() local_irq_enable() irqs_disabled_flags(flags) irqs_disabled() safe_halt() with tracing included if enabled. The arch functions can now all be inline functions rather than some of them having to be macros. Signed-off-by: David Howells <dhowells@redhat.com> [X86, FRV, MN10300] Signed-off-by: Chris Metcalf <cmetcalf@tilera.com> [Tile] Signed-off-by: Michal Simek <monstr@monstr.eu> [Microblaze] Tested-by: Catalin Marinas <catalin.marinas@arm.com> [ARM] Acked-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> [AVR] Acked-by: Tony Luck <tony.luck@intel.com> [IA-64] Acked-by: Hirokazu Takata <takata@linux-m32r.org> [M32R] Acked-by: Greg Ungerer <gerg@uclinux.org> [M68K/M68KNOMMU] Acked-by: Ralf Baechle <ralf@linux-mips.org> [MIPS] Acked-by: Kyle McMartin <kyle@mcmartin.ca> [PA-RISC] Acked-by: Paul Mackerras <paulus@samba.org> [PowerPC] Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> [S390] Acked-by: Chen Liqin <liqin.chen@sunplusct.com> [Score] Acked-by: Matt Fleming <matt@console-pimps.org> [SH] Acked-by: David S. Miller <davem@davemloft.net> [Sparc] Acked-by: Chris Zankel <chris@zankel.net> [Xtensa] Reviewed-by: Richard Henderson <rth@twiddle.net> [Alpha] Reviewed-by: Yoshinori Sato <ysato@users.sourceforge.jp> [H8300] Cc: starvik@axis.com [CRIS] Cc: jesper.nilsson@axis.com [CRIS] Cc: linux-cris-kernel@axis.com
65 lines
1.5 KiB
C
65 lines
1.5 KiB
C
/*
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* Copyright IBM Corp. 2008, 2009
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*
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* Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <asm/ipl.h>
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#include <asm/sclp.h>
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#include <asm/setup.h>
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#define ADDR2G (1ULL << 31)
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static void find_memory_chunks(struct mem_chunk chunk[])
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{
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unsigned long long memsize, rnmax, rzm;
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unsigned long addr = 0, size;
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int i = 0, type;
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rzm = sclp_get_rzm();
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rnmax = sclp_get_rnmax();
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memsize = rzm * rnmax;
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if (!rzm)
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rzm = 1ULL << 17;
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if (sizeof(long) == 4) {
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rzm = min(ADDR2G, rzm);
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memsize = memsize ? min(ADDR2G, memsize) : ADDR2G;
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}
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do {
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size = 0;
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type = tprot(addr);
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do {
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size += rzm;
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if (memsize && addr + size >= memsize)
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break;
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} while (type == tprot(addr + size));
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if (type == CHUNK_READ_WRITE || type == CHUNK_READ_ONLY) {
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chunk[i].addr = addr;
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chunk[i].size = size;
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chunk[i].type = type;
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i++;
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}
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addr += size;
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} while (addr < memsize && i < MEMORY_CHUNKS);
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}
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void detect_memory_layout(struct mem_chunk chunk[])
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{
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unsigned long flags, cr0;
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memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk));
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/* Disable IRQs, DAT and low address protection so tprot does the
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* right thing and we don't get scheduled away with low address
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* protection disabled.
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*/
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flags = __arch_local_irq_stnsm(0xf8);
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__ctl_store(cr0, 0, 0);
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__ctl_clear_bit(0, 28);
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find_memory_chunks(chunk);
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__ctl_load(cr0, 0, 0);
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arch_local_irq_restore(flags);
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}
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EXPORT_SYMBOL(detect_memory_layout);
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