cma_init_reserved

函数名称：ma_init_reserved_mem() - create custom contiguous area from reserved memory*@base: Base address of the reserved area*@size: Size of the reserved area (in bytes),*@order_per_bit: Order of pages represented by one bit on bitmap.*@name: The name of the area

函数原型：int __init cma_init_reserved_mem(phys_addr_t base, phys_addr_t size, unsigned int order_per_bit, const char *name, struct cma **res_cma)

返回类型：int

参数：

类型	参数	名称
phys_addr_t	base
phys_addr_t	size
unsigned int	order_per_bit
const char *	name
struct cma **	res_cma

181

如果cma_area_count恒等于ARRAY_SIZE - get the number of elements in array @arr*@arr: array to be sized(cma_areas)则

182

打印错误信息("Not enough slots for CMA reserved regions!\n")

183

返回:负ENOSPC

186

如果非size或非memblock_is_region_reserved(base, size)则返回:负EINVAL

190

alignment等于PAGE_SIZE左移max_t - return maximum of two values, using the specified type*@type: data type to use*@x: first value*@y: second value(unsignedlong, Free memory management - zoned buddy allocator. - 1, Huge pages are a constant size )位

194

如果非IS_ALIGNED(alignment >> PAGE_SHIFT determines the page size , 1 << order_per_bit)则返回:负EINVAL

197

如果@a is a power of 2 value (base, alignment)不等于base或@a is a power of 2 value (size, alignment)不等于size则返回:负EINVAL

204

cma等于cma_areas[cma_area_count]

205

如果name则

206

name等于name

207

否则

208

name等于kasprintf(GFP_KERNEL, "cma%d\n", cma_area_count)

209

如果非name则返回:负ENOMEM

212

base_pfn等于PFN_DOWN(base)

213

count等于size右移PAGE_SHIFT determines the page size 位

214

Order of pages represented by one bit 等于order_per_bit

215

res_cma等于cma

216

cma_area_count自加

217

totalcma_pages加等于size除PAGE_SIZE

219

返回:0

**调用者**
名称	描述
cma_declare_contiguous	ma_declare_contiguous() - reserve custom contiguous area@base: Base address of the reserved area optional, use 0 for any@size: Size of the reserved area (in bytes),*@limit: End address of the reserved memory (optional, 0 for any)

源代码转换工具开放的插件接口	X
支持：c/c++/esqlc/java Oracle/Informix/Mysql 插件可实现：逻辑报告代码生成和批量转换代码

函数逻辑报告