mirror of https://gitee.com/openkylin/linux.git
mtd: cfi: deinline large functions
With this .config: http://busybox.net/~vda/kernel_config, after uninlining these functions have sizes and callsite counts as follows: cfi_udelay(): 74 bytes, 26 callsites cfi_send_gen_cmd(): 153 bytes, 95 callsites cfi_build_cmd(): 274 bytes, 123 callsites cfi_build_cmd_addr(): 49 bytes, 15 callsites cfi_merge_status(): 230 bytes, 3 callsites Reduction in code size is about 50,000: text data bss dec hex filename 85842882 22294584 20627456 128764922 7accbfa vmlinux.before 85789648 22294616 20627456 128711720 7abfc28 vmlinux Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com> CC: Dan Carpenter <dan.carpenter@oracle.com> CC: Jingoo Han <jg1.han@samsung.com> CC: Brian Norris <computersforpeace@gmail.com> CC: Aaron Sierra <asierra@xes-inc.com> CC: Artem Bityutskiy <Artem.Bityutskiy@linux.intel.com> CC: David Woodhouse <David.Woodhouse@intel.com> CC: linux-mtd@lists.infradead.org CC: linux-kernel@vger.kernel.org Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Denys Vlasenko
Brian Norris
parent
c3c263a8a3
commit
4612c715a6
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@ -23,6 +23,194 @@
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#include <linux/mtd/map.h>
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#include <linux/mtd/cfi.h>
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void cfi_udelay(int us)
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{
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if (us >= 1000) {
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msleep((us+999)/1000);
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} else {
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udelay(us);
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cond_resched();
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}
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}
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EXPORT_SYMBOL(cfi_udelay);
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/*
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* Returns the command address according to the given geometry.
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*/
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uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
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struct map_info *map, struct cfi_private *cfi)
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{
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unsigned bankwidth = map_bankwidth(map);
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unsigned interleave = cfi_interleave(cfi);
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unsigned type = cfi->device_type;
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uint32_t addr;
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addr = (cmd_ofs * type) * interleave;
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/* Modify the unlock address if we are in compatibility mode.
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* For 16bit devices on 8 bit busses
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* and 32bit devices on 16 bit busses
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* set the low bit of the alternating bit sequence of the address.
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*/
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if (((type * interleave) > bankwidth) && ((cmd_ofs & 0xff) == 0xaa))
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addr |= (type >> 1)*interleave;
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return addr;
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}
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EXPORT_SYMBOL(cfi_build_cmd_addr);
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/*
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* Transforms the CFI command for the given geometry (bus width & interleave).
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* It looks too long to be inline, but in the common case it should almost all
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* get optimised away.
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*/
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map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
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{
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map_word val = { {0} };
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int wordwidth, words_per_bus, chip_mode, chips_per_word;
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unsigned long onecmd;
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int i;
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/* We do it this way to give the compiler a fighting chance
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of optimising away all the crap for 'bankwidth' larger than
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an unsigned long, in the common case where that support is
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disabled */
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if (map_bankwidth_is_large(map)) {
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wordwidth = sizeof(unsigned long);
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words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
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} else {
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wordwidth = map_bankwidth(map);
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words_per_bus = 1;
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}
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chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
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chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
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/* First, determine what the bit-pattern should be for a single
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device, according to chip mode and endianness... */
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switch (chip_mode) {
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default: BUG();
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case 1:
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onecmd = cmd;
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break;
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case 2:
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onecmd = cpu_to_cfi16(map, cmd);
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break;
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case 4:
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onecmd = cpu_to_cfi32(map, cmd);
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break;
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}
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/* Now replicate it across the size of an unsigned long, or
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just to the bus width as appropriate */
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switch (chips_per_word) {
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default: BUG();
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#if BITS_PER_LONG >= 64
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case 8:
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onecmd |= (onecmd << (chip_mode * 32));
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#endif
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case 4:
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onecmd |= (onecmd << (chip_mode * 16));
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case 2:
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onecmd |= (onecmd << (chip_mode * 8));
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case 1:
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;
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}
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/* And finally, for the multi-word case, replicate it
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in all words in the structure */
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for (i=0; i < words_per_bus; i++) {
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val.x[i] = onecmd;
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}
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return val;
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}
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EXPORT_SYMBOL(cfi_build_cmd);
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unsigned long cfi_merge_status(map_word val, struct map_info *map,
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struct cfi_private *cfi)
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{
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int wordwidth, words_per_bus, chip_mode, chips_per_word;
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unsigned long onestat, res = 0;
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int i;
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/* We do it this way to give the compiler a fighting chance
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of optimising away all the crap for 'bankwidth' larger than
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an unsigned long, in the common case where that support is
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disabled */
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if (map_bankwidth_is_large(map)) {
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wordwidth = sizeof(unsigned long);
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words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
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} else {
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wordwidth = map_bankwidth(map);
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words_per_bus = 1;
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}
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chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
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chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
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onestat = val.x[0];
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/* Or all status words together */
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for (i=1; i < words_per_bus; i++) {
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onestat |= val.x[i];
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}
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res = onestat;
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switch(chips_per_word) {
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default: BUG();
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#if BITS_PER_LONG >= 64
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case 8:
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res |= (onestat >> (chip_mode * 32));
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#endif
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case 4:
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res |= (onestat >> (chip_mode * 16));
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case 2:
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res |= (onestat >> (chip_mode * 8));
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case 1:
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;
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}
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/* Last, determine what the bit-pattern should be for a single
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device, according to chip mode and endianness... */
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switch (chip_mode) {
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case 1:
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break;
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case 2:
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res = cfi16_to_cpu(map, res);
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break;
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case 4:
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res = cfi32_to_cpu(map, res);
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break;
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default: BUG();
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}
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return res;
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}
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EXPORT_SYMBOL(cfi_merge_status);
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/*
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* Sends a CFI command to a bank of flash for the given geometry.
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*
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* Returns the offset in flash where the command was written.
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* If prev_val is non-null, it will be set to the value at the command address,
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* before the command was written.
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*/
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uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
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struct map_info *map, struct cfi_private *cfi,
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int type, map_word *prev_val)
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{
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map_word val;
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uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi);
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val = cfi_build_cmd(cmd, map, cfi);
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if (prev_val)
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*prev_val = map_read(map, addr);
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map_write(map, val, addr);
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return addr - base;
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}
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EXPORT_SYMBOL(cfi_send_gen_cmd);
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int __xipram cfi_qry_present(struct map_info *map, __u32 base,
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struct cfi_private *cfi)
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{
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@ -296,183 +296,19 @@ struct cfi_private {
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struct flchip chips[0]; /* per-chip data structure for each chip */
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};
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/*
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* Returns the command address according to the given geometry.
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*/
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static inline uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
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struct map_info *map, struct cfi_private *cfi)
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{
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unsigned bankwidth = map_bankwidth(map);
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unsigned interleave = cfi_interleave(cfi);
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unsigned type = cfi->device_type;
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uint32_t addr;
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addr = (cmd_ofs * type) * interleave;
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uint32_t cfi_build_cmd_addr(uint32_t cmd_ofs,
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struct map_info *map, struct cfi_private *cfi);
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/* Modify the unlock address if we are in compatibility mode.
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* For 16bit devices on 8 bit busses
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* and 32bit devices on 16 bit busses
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* set the low bit of the alternating bit sequence of the address.
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*/
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if (((type * interleave) > bankwidth) && ((cmd_ofs & 0xff) == 0xaa))
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addr |= (type >> 1)*interleave;
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return addr;
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}
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/*
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* Transforms the CFI command for the given geometry (bus width & interleave).
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* It looks too long to be inline, but in the common case it should almost all
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* get optimised away.
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*/
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static inline map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi)
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{
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map_word val = { {0} };
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int wordwidth, words_per_bus, chip_mode, chips_per_word;
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unsigned long onecmd;
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int i;
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/* We do it this way to give the compiler a fighting chance
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of optimising away all the crap for 'bankwidth' larger than
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an unsigned long, in the common case where that support is
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disabled */
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if (map_bankwidth_is_large(map)) {
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wordwidth = sizeof(unsigned long);
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words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
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} else {
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wordwidth = map_bankwidth(map);
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words_per_bus = 1;
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}
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chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
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chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
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/* First, determine what the bit-pattern should be for a single
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device, according to chip mode and endianness... */
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switch (chip_mode) {
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default: BUG();
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case 1:
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onecmd = cmd;
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break;
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case 2:
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onecmd = cpu_to_cfi16(map, cmd);
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break;
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case 4:
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onecmd = cpu_to_cfi32(map, cmd);
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break;
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}
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/* Now replicate it across the size of an unsigned long, or
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just to the bus width as appropriate */
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switch (chips_per_word) {
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default: BUG();
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#if BITS_PER_LONG >= 64
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case 8:
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onecmd |= (onecmd << (chip_mode * 32));
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#endif
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case 4:
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onecmd |= (onecmd << (chip_mode * 16));
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case 2:
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onecmd |= (onecmd << (chip_mode * 8));
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case 1:
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;
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}
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/* And finally, for the multi-word case, replicate it
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in all words in the structure */
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for (i=0; i < words_per_bus; i++) {
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val.x[i] = onecmd;
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}
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return val;
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}
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map_word cfi_build_cmd(u_long cmd, struct map_info *map, struct cfi_private *cfi);
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#define CMD(x) cfi_build_cmd((x), map, cfi)
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static inline unsigned long cfi_merge_status(map_word val, struct map_info *map,
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struct cfi_private *cfi)
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{
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int wordwidth, words_per_bus, chip_mode, chips_per_word;
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unsigned long onestat, res = 0;
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int i;
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/* We do it this way to give the compiler a fighting chance
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of optimising away all the crap for 'bankwidth' larger than
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an unsigned long, in the common case where that support is
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disabled */
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if (map_bankwidth_is_large(map)) {
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wordwidth = sizeof(unsigned long);
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words_per_bus = (map_bankwidth(map)) / wordwidth; // i.e. normally 1
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} else {
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wordwidth = map_bankwidth(map);
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words_per_bus = 1;
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}
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chip_mode = map_bankwidth(map) / cfi_interleave(cfi);
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chips_per_word = wordwidth * cfi_interleave(cfi) / map_bankwidth(map);
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onestat = val.x[0];
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/* Or all status words together */
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for (i=1; i < words_per_bus; i++) {
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onestat |= val.x[i];
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}
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res = onestat;
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switch(chips_per_word) {
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default: BUG();
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#if BITS_PER_LONG >= 64
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case 8:
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res |= (onestat >> (chip_mode * 32));
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#endif
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case 4:
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res |= (onestat >> (chip_mode * 16));
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case 2:
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res |= (onestat >> (chip_mode * 8));
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case 1:
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;
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}
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/* Last, determine what the bit-pattern should be for a single
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device, according to chip mode and endianness... */
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switch (chip_mode) {
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case 1:
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break;
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case 2:
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res = cfi16_to_cpu(map, res);
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break;
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case 4:
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res = cfi32_to_cpu(map, res);
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break;
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default: BUG();
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}
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return res;
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}
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unsigned long cfi_merge_status(map_word val, struct map_info *map,
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struct cfi_private *cfi);
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#define MERGESTATUS(x) cfi_merge_status((x), map, cfi)
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/*
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* Sends a CFI command to a bank of flash for the given geometry.
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*
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* Returns the offset in flash where the command was written.
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* If prev_val is non-null, it will be set to the value at the command address,
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* before the command was written.
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*/
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static inline uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
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uint32_t cfi_send_gen_cmd(u_char cmd, uint32_t cmd_addr, uint32_t base,
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struct map_info *map, struct cfi_private *cfi,
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int type, map_word *prev_val)
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{
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map_word val;
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uint32_t addr = base + cfi_build_cmd_addr(cmd_addr, map, cfi);
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val = cfi_build_cmd(cmd, map, cfi);
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if (prev_val)
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*prev_val = map_read(map, addr);
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map_write(map, val, addr);
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return addr - base;
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}
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int type, map_word *prev_val);
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static inline uint8_t cfi_read_query(struct map_info *map, uint32_t addr)
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{
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@ -506,15 +342,7 @@ static inline uint16_t cfi_read_query16(struct map_info *map, uint32_t addr)
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}
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}
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static inline void cfi_udelay(int us)
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{
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if (us >= 1000) {
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msleep((us+999)/1000);
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} else {
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udelay(us);
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cond_resched();
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}
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}
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void cfi_udelay(int us);
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int __xipram cfi_qry_present(struct map_info *map, __u32 base,
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struct cfi_private *cfi);
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