Fixed some problems with libnvram
- On board-qemu, the logging partitions were too big (bigger than the total NVRAM size). - Fixed a compiler warning about type-punned pointers in nvram.c - When DISABLE_NVRAM is set, the fake buffer should not be accessed with cache-inhibited functions - Makefile did not generate proper dependencies Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
This commit is contained in:
Thomas Huth
parent
f36326c115
commit
1d41e8a29b
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@ -39,14 +39,14 @@
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#define LLFW_LOG_BE0_SIGNATURE 0x51 // signature for general firmware usage
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#define LLFW_LOG_BE0_NAME_PREFIX 0x69626D2C // first 4 bytes of name: "ibm,"
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#define LLFW_LOG_BE0_NAME 0x435055306C6F6700 // remaining 8 bytes : "CPU0log\0"
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#define LLFW_LOG_BE0_LENGTH 0x2000 // Partition length in block of 16 bytes
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#define LLFW_LOG_BE0_LENGTH 0x200 // Partition length in block of 16 bytes
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#define LLFW_LOG_BE0_DATA_OFFSET 0x40 // offset in bytes between header and data
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#define LLFW_LOG_BE0_FLAGS 0 // unused
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#define LLFW_LOG_BE1_SIGNATURE 0x51 // signature for general firmware usage
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#define LLFW_LOG_BE1_NAME_PREFIX 0x69626D2C // first 4 bytes of name: "ibm,"
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#define LLFW_LOG_BE1_NAME 0x435055316C6F6700 // remaining 8 bytes : "CPU1log\0\0"
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#define LLFW_LOG_BE1_LENGTH 0x500 // Partition length in block of 16 bytes
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#define LLFW_LOG_BE1_LENGTH 0x80 // Partition length in block of 16 bytes
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#define LLFW_LOG_BE1_DATA_OFFSET 0x40 // offset in bytes between header and data
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#define LLFW_LOG_BE1_FLAGS 0x0 // unused
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@ -59,7 +59,6 @@
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#define LLFW_LOG_POS_POINTER 0x14 // 20
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// NVRAM info
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#define MAMBO_NVRAM_BASE 0x100000 // NVRAM Base for MAMBO
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#define NVRAM_EMPTY_PATTERN 0x0000000000000000 // Pattern (64-bit) used to overwrite NVRAM
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#endif
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@ -14,6 +14,8 @@ SRCS = nvram.c envvar.c
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TOPCMNDIR ?= ../..
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include $(TOPCMNDIR)/make.rules
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ASFLAGS = $(FLAG) $(RELEASE) $(CPUARCHDEF) -Wa,-mregnames
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CPPFLAGS = -I../libc/include $(CPUARCHDEF) $(FLAG) \
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-I$(INCLBRDDIR) -I$(INCLCMNDIR)/$(CPUARCH) -I. -I../../include
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@ -43,6 +45,7 @@ depend:
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$(MAKE) Makefile.dep
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Makefile.dep: Makefile
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$(CC) -MM $(CPPFLAGS) $(CFLAGS) $(SRCS) > Makefile.dep
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# Include dependency file if available:
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@ -30,22 +30,30 @@
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void asm_cout(long Character,long UART,long NVRAM);
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#if defined(DISABLE_NVRAM)
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static volatile uint8_t nvram[NVRAM_LENGTH]; /* FAKE */
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#else
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#define nvram_access(type,size,name) \
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type nvram_read_##name(unsigned int offset) \
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{ \
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type *pos; \
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if (offset > (NVRAM_LENGTH - sizeof(type))) \
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return 0; \
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pos = (type *)(nvram+offset); \
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return *pos; \
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} \
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void nvram_write_##name(unsigned int offset, type data) \
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{ \
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type *pos; \
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if (offset > (NVRAM_LENGTH - sizeof(type))) \
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return; \
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pos = (type *)(nvram+offset); \
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*pos = data; \
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}
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#else /* DISABLE_NVRAM */
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static volatile uint8_t *nvram = (volatile uint8_t *)SB_NVRAM_adr;
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#endif
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/* This is extremely ugly, but still better than implementing
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* another sbrk() around it.
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*/
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static char nvram_buffer[NVRAM_LENGTH];
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static uint8_t nvram_buffer_locked=0x00;
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/**
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* producer for nvram access functions. Since these functions are
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* basically all the same except for the used data types, produce
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* them via the following macro to keep the code from bloating.
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*/
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#define nvram_access(type,size,name) \
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type nvram_read_##name(unsigned int offset) \
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@ -65,11 +73,26 @@ static uint8_t nvram_buffer_locked=0x00;
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ci_write_##size(pos, data); \
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}
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#endif
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/*
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* producer for nvram access functions. Since these functions are
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* basically all the same except for the used data types, produce
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* them via the nvram_access macro to keep the code from bloating.
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*/
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nvram_access(uint8_t, 8, byte)
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nvram_access(uint16_t, 16, word)
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nvram_access(uint32_t, 32, dword)
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nvram_access(uint64_t, 64, qword)
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/*
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* This is extremely ugly, but still better than implementing
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* another sbrk() around it.
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*/
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static char nvram_buffer[NVRAM_LENGTH];
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static uint8_t nvram_buffer_locked=0x00;
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/**
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* This function is a minimal abstraction for our temporary
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* buffer. It should have been malloced, but since there is no
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@ -189,7 +212,8 @@ static int calc_used_nvram_space(void)
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int walk, len;
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for (walk=0; walk<NVRAM_LENGTH;) {
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if(get_partition_header_checksum(walk) !=
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if(nvram_read_byte(walk) == 0
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|| get_partition_header_checksum(walk) !=
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calc_partition_header_checksum(walk)) {
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/* If there's no valid entry, bail out */
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break;
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@ -235,6 +259,8 @@ partition_t get_partition(unsigned int type, char *name)
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partition_t ret={0,-1};
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int walk, len;
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DEBUG("get_partition(%i, '%s')\n", type, name);
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for (walk=0; walk<NVRAM_LENGTH;) {
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// DEBUG("get_partition: walk=%x\n", walk);
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if(get_partition_header_checksum(walk) !=
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@ -492,20 +518,23 @@ static void init_cpulog_partition(partition_t cpulog)
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void reset_nvram(void)
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{
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partition_t cpulog0, cpulog1;
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char header[12];
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struct {
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uint32_t prefix;
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uint64_t name;
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} __attribute__((packed)) header;
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DEBUG("Erasing NVRAM\n");
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erase_nvram(0, NVRAM_LENGTH);
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DEBUG("Creating CPU log partitions\n");
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*(uint32_t *)(char *)&(header[0]) = be32_to_cpu(LLFW_LOG_BE0_NAME_PREFIX);
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*(uint64_t *)(char *)&(header[4]) = be64_to_cpu(LLFW_LOG_BE0_NAME);
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cpulog0=create_nvram_partition(LLFW_LOG_BE0_SIGNATURE, header,
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header.prefix = be32_to_cpu(LLFW_LOG_BE0_NAME_PREFIX);
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header.name = be64_to_cpu(LLFW_LOG_BE0_NAME);
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cpulog0=create_nvram_partition(LLFW_LOG_BE0_SIGNATURE, (char *)&header,
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(LLFW_LOG_BE0_LENGTH*16)-PARTITION_HEADER_SIZE);
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*(uint32_t *)(char *)&(header[0]) = be32_to_cpu(LLFW_LOG_BE1_NAME_PREFIX);
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*(uint64_t *)(char *)&(header[4]) = be64_to_cpu(LLFW_LOG_BE1_NAME);
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cpulog1=create_nvram_partition(LLFW_LOG_BE1_SIGNATURE, header,
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header.prefix = be32_to_cpu(LLFW_LOG_BE1_NAME_PREFIX);
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header.name = be64_to_cpu(LLFW_LOG_BE1_NAME);
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cpulog1=create_nvram_partition(LLFW_LOG_BE1_SIGNATURE, (char *)&header,
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(LLFW_LOG_BE1_LENGTH*16)-PARTITION_HEADER_SIZE);
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DEBUG("Initializing CPU log partitions\n");
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