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33 #include "fman_muram.h"
36 #include <linux/slab.h>
37 #include <linux/genalloc.h>
40 struct gen_pool *pool;
46 static unsigned long fman_muram_vbase_to_offset(struct muram_info *muram,
49 return vaddr - (unsigned long)muram->vbase;
54 * @base: Pointer to base of memory mapped FM-MURAM.
55 * @size: Size of the FM-MURAM partition.
57 * Creates partition in the MURAM.
58 * The routine returns a pointer to the MURAM partition.
59 * This pointer must be passed as to all other FM-MURAM function calls.
60 * No actual initialization or configuration of FM_MURAM hardware is done by
63 * Return: pointer to FM-MURAM object, or NULL for Failure.
65 struct muram_info *fman_muram_init(phys_addr_t base, size_t size)
67 struct muram_info *muram;
71 muram = kzalloc(sizeof(*muram), GFP_KERNEL);
75 muram->pool = gen_pool_create(ilog2(64), -1);
77 pr_err("%s(): MURAM pool create failed\n", __func__);
81 vaddr = ioremap(base, size);
83 pr_err("%s(): MURAM ioremap failed\n", __func__);
87 ret = gen_pool_add_virt(muram->pool, (unsigned long)vaddr,
90 pr_err("%s(): MURAM pool add failed\n", __func__);
95 memset_io(vaddr, 0, (int)size);
102 gen_pool_destroy(muram->pool);
109 * fman_muram_offset_to_vbase
110 * @muram: FM-MURAM module pointer.
111 * @offset: the offset of the memory block
113 * Gives the address of the memory region from specific offset
115 * Return: The address of the memory block
117 unsigned long fman_muram_offset_to_vbase(struct muram_info *muram,
118 unsigned long offset)
120 return offset + (unsigned long)muram->vbase;
125 * @muram: FM-MURAM module pointer.
126 * @size: Size of the memory to be allocated.
128 * Allocate some memory from FM-MURAM partition.
130 * Return: address of the allocated memory; NULL otherwise.
132 unsigned long fman_muram_alloc(struct muram_info *muram, size_t size)
136 vaddr = gen_pool_alloc(muram->pool, size);
140 memset_io((void __iomem *)vaddr, 0, size);
142 return fman_muram_vbase_to_offset(muram, vaddr);
146 * fman_muram_free_mem
147 * muram: FM-MURAM module pointer.
148 * offset: offset of the memory region to be freed.
149 * size: size of the memory to be freed.
151 * Free an allocated memory from FM-MURAM partition.
153 void fman_muram_free_mem(struct muram_info *muram, unsigned long offset,
156 unsigned long addr = fman_muram_offset_to_vbase(muram, offset);
158 gen_pool_free(muram->pool, addr, size);