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util/nvmutil: Obey the 79-character per line limit 

Must not exceed 79 lines. Some variables and functions have
been renamed, and there has been some minor re-factoring.

Signed-off-by: Leah Rowe <leah@libreboot.org>
master
Leah Rowe 2025-01-01 21:10:56 +00:00
parent 637b5e36fd
commit ed7293494e
1 changed files with 33 additions and 32 deletions
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65
util/nvmutil/nvmutil.c
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@ -14,22 +14,22 @@
#include <string.h>
#include <unistd.h>
void cmd_setchecksum(void), cmd_brick(void), cmd_copy(void), writeGbeFile(void),
cmd_dump(void), cmd_setmac(void), readGbeFile(void), showmac(int partnum),
hexdump(int partnum), handle_endianness(int partnum), openFiles(const char *path);
int macAddress(const char *strMac, uint16_t *mac), validChecksum(int partnum);
void cmd_setchecksum(void), cmd_brick(void), swap(int partnum), writeGbe(void),
cmd_dump(void), cmd_setmac(void), readGbe(void), cmd_copy(void),
macf(int partnum), hexdump(int partnum), openFiles(const char *path);
int macAddress(const char *strMac, uint16_t *mac), goodChecksum(int partnum);
uint8_t hextonum(char chs), rhex(void);
#define COMMAND argv[2]
#define MAC_ADDRESS argv[3]
#define PARTNUM argv[3]
#define PARTN argv[3]
#define SIZE_4KB 0x1000
uint16_t buf16[SIZE_4KB], mac[3] = {0, 0, 0};
uint8_t *buf = (uint8_t *) &buf16;
size_t nf = 128, gbe[2];
uint8_t nvmPartModified[2] = {0, 0}, skipread[2] = {0, 0};
int e = 1, flags = O_RDWR, rfd, fd, part, gbeFileModified = 0;
uint8_t nvmPartChanged[2] = {0, 0}, skipread[2] = {0, 0};
int e = 1, flags = O_RDWR, rfd, fd, part, gbeFileChanged = 0;
const char *strMac = NULL, *strRMac = "??:??:??:??:??:??", *filename = NULL;
@ -41,7 +41,7 @@ typedef struct op {
op_t op[] = {
{ .str = "dump", .cmd = cmd_dump, .args = 3},
{ .str = "setmac", .cmd = cmd_setmac, .args = 3},
{ .str = "swap", .cmd = writeGbeFile, .args = 3},
{ .str = "swap", .cmd = writeGbe, .args = 3},
{ .str = "copy", .cmd = cmd_copy, .args = 4},
{ .str = "brick", .cmd = cmd_brick, .args = 4},
{ .str = "setchecksum", .cmd = cmd_setchecksum, .args = 4},
@ -56,8 +56,8 @@ void (*cmd)(void) = NULL;
if (fstat(f, &st) == -1) err(ERR(), "%s", l)
#define word(pos16, partnum) buf16[pos16 + (partnum << 11)]
#define setWord(pos16, p, val16) if ((gbeFileModified = 1) && \
word(pos16, p) != val16) nvmPartModified[p] = 1 | (word(pos16, p) = val16)
#define setWord(pos16, p, val16) if ((gbeFileChanged = 1) && \
word(pos16, p) != val16) nvmPartChanged[p] = 1 | (word(pos16, p) = val16)
int
main(int argc, char *argv[])
@ -96,15 +96,15 @@ main(int argc, char *argv[])
if (cmd == cmd_setmac)
strMac = (argc > 3) ? MAC_ADDRESS : strRMac;
else if ((cmd != NULL) && (argc > 3))
err_if((errno = (!((part = PARTNUM[0] - '0') == 0 || part == 1))
|| PARTNUM[1] ? EINVAL : errno));
err_if((errno = (!((part = PARTN[0] - '0') == 0 || part == 1))
|| PARTN[1] ? EINVAL : errno));
err_if((errno = (cmd == NULL) ? EINVAL : errno));
readGbeFile();
readGbe();
(*cmd)();
if ((gbeFileModified) && (flags != O_RDONLY) && (cmd != writeGbeFile))
writeGbeFile();
if ((gbeFileChanged) && (flags != O_RDONLY) && (cmd != writeGbe))
writeGbe();
err_if((errno != 0) && (cmd != cmd_dump));
return errno;
}
@ -121,9 +121,9 @@ openFiles(const char *path)
}
void
readGbeFile(void)
readGbe(void)
{
nf = ((cmd == writeGbeFile) || (cmd == cmd_copy)) ? SIZE_4KB : nf;
nf = ((cmd == writeGbe) || (cmd == cmd_copy)) ? SIZE_4KB : nf;
skipread[part ^ 1] = (cmd == cmd_copy) | (cmd == cmd_setchecksum)
| (cmd == cmd_brick);
gbe[1] = (gbe[0] = (size_t) buf) + SIZE_4KB;
@ -131,7 +131,7 @@ readGbeFile(void)
if (skipread[p])
continue;
err_if(pread(fd, (uint8_t *) gbe[p], nf, p << 12) == -1);
handle_endianness(p);
swap(p);
}
}
@ -141,7 +141,7 @@ cmd_setmac(void)
if (macAddress(strMac, mac))
err(errno = ECANCELED, "Bad MAC address");
for (int partnum = 0; partnum < 2; partnum++) {
if (!validChecksum(part = partnum))
if (!goodChecksum(part = partnum))
continue;
for (int w = 0; w < 3; w++)
setWord(w, partnum, mac[w]);
@ -197,16 +197,16 @@ void
cmd_dump(void)
{
for (int partnum = 0, numInvalid = 0; partnum < 2; partnum++) {
if (!validChecksum(partnum))
if (!goodChecksum(partnum))
++numInvalid;
printf("MAC (part %d): ", partnum);
showmac(partnum), hexdump(partnum);
macf(partnum), hexdump(partnum);
errno = ((numInvalid < 2) && (partnum)) ? 0 : errno;
}
}
void
showmac(int partnum)
macf(int partnum)
{
for (int c = 0; c < 3; c++) {
uint16_t val16 = word(c, partnum);
@ -239,19 +239,19 @@ cmd_setchecksum(void)
void
cmd_brick(void)
{
if (validChecksum(part))
if (goodChecksum(part))
setWord(0x3F, part, ((word(0x3F, part)) ^ 0xFF));
}
void
cmd_copy(void)
{
if ((gbeFileModified = nvmPartModified[part ^ 1] = validChecksum(part)))
if ((gbeFileChanged = nvmPartChanged[part ^ 1] = goodChecksum(part)))
gbe[part ^ 1] = gbe[part]; /* speedhack: copy ptr, not words */
}
int
validChecksum(int partnum)
goodChecksum(int partnum)
{
uint16_t total = 0;
for(int w = 0; w <= 0x3F; w++)
@ -263,13 +263,13 @@ validChecksum(int partnum)
}
void
writeGbeFile(void)
writeGbe(void)
{
err_if((cmd == writeGbeFile) && !(validChecksum(0) || validChecksum(1)));
for (int p = 0, x = (cmd == writeGbeFile) ? 1 : 0; p < 2; p++) {
if ((!nvmPartModified[p]) && (cmd != writeGbeFile))
err_if((cmd == writeGbe) && !(goodChecksum(0) || goodChecksum(1)));
for (int p = 0, x = (cmd == writeGbe) ? 1 : 0; p < 2; p++) {
if ((!nvmPartChanged[p]) && (cmd != writeGbe))
continue;
handle_endianness(p^x);
swap(p^x);
err_if(pwrite(fd, (uint8_t *) gbe[p^x], nf, p << 12) == -1);
}
errno = 0;
@ -277,9 +277,10 @@ writeGbeFile(void)
}
void
handle_endianness(int partnum)
swap(int partnum)
{
size_t w, x;
uint8_t *n = (uint8_t *) gbe[partnum];
for (size_t w = nf * ((uint8_t *) &e)[0], x = 1; w < nf; w += 2, x += 2)
for (w = nf * ((uint8_t *) &e)[0], x = 1; w < nf; w += 2, x += 2)
n[w] ^= n[x], n[x] ^= n[w], n[w] ^= n[x];
}