Multiuser, Capabilities and Access Controls (#54)

[lunaix-os.git] / lunaix-os / kernel / mm / valloc.c

diff --git a/lunaix-os/kernel/mm/valloc.c b/lunaix-os/kernel/mm/valloc.c
index 44295625f3adb8f6bfe239618e565219a0829657..d2baa352b05ee81f231b0739c75caa022ec175b4 100644 (file)
--- a/lunaix-os/kernel/mm/valloc.c
+++ b/lunaix-os/kernel/mm/valloc.c
@@ -1,46 +1,162 @@
+#include <klibc/string.h>
 #include <lunaix/mm/cake.h>
+#include <lunaix/mm/valloc.h>
+#include <lunaix/spike.h>
 
-#define MAX_CLASS 6
+#define CLASS_LEN(class) (sizeof(class) / sizeof(class[0]))
 
-static char piles_names[MAX_CLASS][PILE_NAME_MAXLEN] = {
-    "valloc_128", "valloc_256", "valloc_512",
-    "valloc_1k",  "valloc_2k",  "valloc_4k"
+// threshold to use external cake metadata
+#define EXTERN_THRESHOLD    128
+
+static char piles_names[][PILE_NAME_MAXLEN] = 
+{
+    "valloc_8",   "valloc_16",  "valloc_32",  "valloc_64",
+    "valloc_128", "valloc_256", "valloc_512", "valloc_1k",
+    "valloc_2k",  "valloc_4k",  "valloc_8k"  
+};
+
+#define M128    (4)
+#define M1K     (M128 + 3)
+
+static int page_counts[] = 
+{
+    [0] = 1,
+    [1] = 1,
+    [2] = 1,
+    [3] = 1,
+    [M128    ] = 1,
+    [M128 + 1] = 2,
+    [M128 + 2] = 2,
+    [M1K     ] = 4,
+    [M1K + 1 ] = 4,
+    [M1K + 2 ] = 8,
+    [M1K + 3 ] = 8
+};
+
+static char piles_names_dma[][PILE_NAME_MAXLEN] = 
+{
+    "valloc_dma_128", "valloc_dma_256", "valloc_dma_512",
+    "valloc_dma_1k",  "valloc_dma_2k",  "valloc_dma_4k"
 };
 
-static struct cake_pile* piles[MAX_CLASS];
+static struct cake_pile* piles[CLASS_LEN(piles_names)];
+static struct cake_pile* piles_dma[CLASS_LEN(piles_names_dma)];
 
 void
 valloc_init()
 {
-    for (size_t i = 0; i < MAX_CLASS; i++) {
+    int opts = 0;
+    for (size_t i = 0; i < CLASS_LEN(piles_names); i++) {
+        int size = 1 << (i + 3);
+        if (size >= EXTERN_THRESHOLD) {
+            opts |= PILE_FL_EXTERN;
+        }
+        piles[i] = cake_new_pile(piles_names[i], size, page_counts[i], opts);
+    }
+
+    opts = PILE_ALIGN_CACHE;
+    // DMA 内存保证128字节对齐
+    for (size_t i = 0; i < CLASS_LEN(piles_names_dma); i++) {
         int size = 1 << (i + 7);
-        piles[i] = cake_new_pile(&piles_names[i], size, size > 1024 ? 8 : 1);
+        if (size >= EXTERN_THRESHOLD) {
+            opts |= PILE_FL_EXTERN;
+        }
+        piles_dma[i] = cake_new_pile(
+            piles_names_dma[i], size, page_counts[M128 + i], opts);
     }
 }
 
 void*
-valloc(unsigned int size)
+__valloc(unsigned int size,
+         struct cake_pile** segregate_list,
+         size_t len,
+         size_t boffset)
+{
+    size_t i = ilog2(size);
+    i += (size - (1 << i) != 0);
+    i -= boffset;
+
+    if (i >= len)
+        i = 0;
+
+    return cake_grab(segregate_list[i]);
+}
+
+void
+__vfree(void* ptr, struct cake_pile** segregate_list, size_t len)
 {
     size_t i = 0;
-    for (; i < MAX_CLASS; i++) {
-        if (piles[i]->piece_size > size) {
-            goto found_class;
+    for (; i < len; i++) {
+        if (cake_release(segregate_list[i], ptr)) {
+            return;
         }
     }
+}
+
+void*
+valloc(unsigned int size)
+{
+    return __valloc(size, piles, CLASS_LEN(piles_names), 3);
+}
+
+void*
+vzalloc(unsigned int size)
+{
+    void* ptr = __valloc(size, piles, CLASS_LEN(piles_names), 3);
+    memset(ptr, 0, size);
+    return ptr;
+}
 
-    return NULL;
+void*
+vcalloc(unsigned int size, unsigned int count)
+{
+    unsigned int alloc_size;
+    if (umul_of(size, count, &alloc_size)) {
+        return 0;
+    }
 
-found_class:
-    return cake_grab(piles[i]);
+    void* ptr = __valloc(alloc_size, piles, CLASS_LEN(piles_names), 3);
+    memset(ptr, 0, alloc_size);
+    return ptr;
 }
 
 void
 vfree(void* ptr)
 {
-    size_t i = 0;
-    for (; i < MAX_CLASS; i++) {
-        if (cake_release(piles[i], ptr)) {
-            return;
-        }
+    __vfree(ptr, piles, CLASS_LEN(piles_names));
+}
+
+void
+vfree_safe(void* ptr)
+{
+    if (!ptr) {
+        return;
     }
+
+    __vfree(ptr, piles, CLASS_LEN(piles_names));
+}
+
+void*
+valloc_dma(unsigned int size)
+{
+    return __valloc(size, piles_dma, CLASS_LEN(piles_names_dma), 7);
+}
+
+void*
+vzalloc_dma(unsigned int size)
+{
+    void* ptr = __valloc(size, piles_dma, CLASS_LEN(piles_names_dma), 7);
+    memset(ptr, 0, size);
+    return ptr;
+}
+
+void
+vfree_dma(void* ptr)
+{
+    __vfree(ptr, piles_dma, CLASS_LEN(piles_names_dma));
+}
+
+inline void must_inline
+valloc_ensure_valid(void* ptr) {
+    cake_ensure_valid(ptr);
 }
\ No newline at end of file