89 lines
2.7 KiB
C
89 lines
2.7 KiB
C
#ifndef _PROPERTY_H_
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#define _PROPERTY_H_
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#define TINY_PROP_AREA (1)
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typedef struct asr_prop_area asr_prop_area;
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typedef struct asr_prop_info asr_prop_info;
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#define ASR_PROP_AREA_MAGIC 0x504f5250 /*"PROP" */
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#define ASR_PROP_AREA_VERSION 0x00000002
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#define ASR_PROP_AREA_OFFSET 0x00000C00
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#define ASR_PROP_AREA_TOTAL_SIZE 0x00001000
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/*asr_prop_info_size = PROP_NAME_MAX + PROP_VALUE_MAX + sizeof(asr_prop_info.serial) */
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/*ASR_PA_COUNT_MAX = (ASR_PA_SIZE - ASR_PA_INFO_START)/asr_prop_info_size */
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/*ASR_PA_INFO_START >= (ASR_PA_COUNT_MAX*4) + sizeof[asr_prop_area(magic+count+serial+version+reserved[4])] */
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#define PROP_NAME_MAX 20
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#define PROP_VALUE_MAX 40
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#define ASR_PA_INFO_START 256
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/*for preboot & boot2 */
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/*the limitation of PROPERTY_ASRE size should be 1k */
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/*[0xB0020C00]~[0xB0021000] 1K PROPERTY */
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/*after boot2 but before CP */
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/*the limitation of PROPERTY_ASRE size should be 4k */
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/*[0xB0020C00]~[0xB0021C00] 4K PROPERTY */
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#ifdef TINY_PROP_AREA
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#define ASR_PA_COUNT_MAX 12
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#define ASR_PA_SIZE 1024
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#else
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#define ASR_PA_COUNT_MAX 60
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#define ASR_PA_SIZE (ASR_PROP_AREA_TOTAL_SIZE)
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#endif
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#define TOC_NAME_LEN(toc) ((toc) >> 24)
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#define TOC_TO_INFO(area, toc) ((asr_prop_info *)(((char *)area) + ((toc) & 0xFFFFFF)))
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#define PROP_NAME_BOOTMODE "bl2.bootmode"
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#define PROP_NAME_GO_PRODUCTION "bl2.go_production"
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struct asr_prop_area {
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unsigned magic;
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unsigned volatile count;
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unsigned volatile serial;
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unsigned version;
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unsigned reserved[4];
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/*a pointer here */
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unsigned toc[1];
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};
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#define SERIAL_VALUE_LEN(serial) ((serial) >> 24)
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#define SERIAL_DIRTY(serial) ((serial) & 1)
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/*
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** Rules:
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**
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** - there is only one writer, but many readers
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** - asr_prop_area.count will never decrease in value
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** - once allocated, a prop_info's name will not change
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** - once allocated, a prop_info's offset will not change
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** - reading a value requires the following steps
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** 1. serial = pi->serial
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** 2. if SERIAL_DIRTY(serial), wait*, then goto 1
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** 3. memcpy(local, pi->value, SERIAL_VALUE_LEN(serial) + 1)
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** 4. if pi->serial != serial, goto 2
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**
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** - writing a value requires the following steps
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** 1. pi->serial = pi->serial | 1
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** 2. memcpy(pi->value, local_value, value_len)
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** 3. pi->serial = (value_len << 24) | ((pi->serial + 1) & 0xffffff)
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**
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*/
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struct asr_prop_info {
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char name[PROP_NAME_MAX];
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unsigned volatile serial;
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char value[PROP_VALUE_MAX];
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};
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/*COMMON_API */
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int asr_property_area_init(int force_init);
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int asr_property_dump(void);
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int asr_property_set(const char *name, const char *value);
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const char *asr_property_get(const char *name);
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int asr_property_get_buffer(const char *name, char *buffer, unsigned buffer_size);
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#endif /*_PROPERTY_H_*/
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