From 748e4f3d702def1a4bff191e0cf93b6a05340f01 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:41:34 +0000
Subject: [PATCH] add gpio led uart
---
kernel/arch/sparc/mm/highmem.c | 34 ++++++++--------------------------
1 files changed, 8 insertions(+), 26 deletions(-)
diff --git a/kernel/arch/sparc/mm/highmem.c b/kernel/arch/sparc/mm/highmem.c
index 86bc2a5..8f2a2af 100644
--- a/kernel/arch/sparc/mm/highmem.c
+++ b/kernel/arch/sparc/mm/highmem.c
@@ -29,35 +29,22 @@
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
-#include <asm/pgalloc.h>
#include <asm/vaddrs.h>
-
-pgprot_t kmap_prot;
static pte_t *kmap_pte;
void __init kmap_init(void)
{
- unsigned long address;
- pmd_t *dir;
-
- address = __fix_to_virt(FIX_KMAP_BEGIN);
- dir = pmd_offset(pgd_offset_k(address), address);
+ unsigned long address = __fix_to_virt(FIX_KMAP_BEGIN);
/* cache the first kmap pte */
- kmap_pte = pte_offset_kernel(dir, address);
- kmap_prot = __pgprot(SRMMU_ET_PTE | SRMMU_PRIV | SRMMU_CACHE);
+ kmap_pte = virt_to_kpte(address);
}
-void *kmap_atomic(struct page *page)
+void *kmap_atomic_high_prot(struct page *page, pgprot_t prot)
{
unsigned long vaddr;
long idx, type;
-
- preempt_disable();
- pagefault_disable();
- if (!PageHighMem(page))
- return page_address(page);
type = kmap_atomic_idx_push();
idx = type + KM_TYPE_NR*smp_processor_id();
@@ -73,7 +60,7 @@
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(*(kmap_pte-idx)));
#endif
- set_pte(kmap_pte-idx, mk_pte(page, kmap_prot));
+ set_pte(kmap_pte-idx, mk_pte(page, prot));
/* XXX Fix - Anton */
#if 0
__flush_tlb_one(vaddr);
@@ -83,18 +70,15 @@
return (void*) vaddr;
}
-EXPORT_SYMBOL(kmap_atomic);
+EXPORT_SYMBOL(kmap_atomic_high_prot);
-void __kunmap_atomic(void *kvaddr)
+void kunmap_atomic_high(void *kvaddr)
{
unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK;
int type;
- if (vaddr < FIXADDR_START) { // FIXME
- pagefault_enable();
- preempt_enable();
+ if (vaddr < FIXADDR_START)
return;
- }
type = kmap_atomic_idx();
@@ -127,7 +111,5 @@
#endif
kmap_atomic_idx_pop();
- pagefault_enable();
- preempt_enable();
}
-EXPORT_SYMBOL(__kunmap_atomic);
+EXPORT_SYMBOL(kunmap_atomic_high);
--
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