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wip: going to try heuristic patching

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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2019-02-22 20:49:34 +08:00
parent 635a9a2d48
commit 00fe7d0cdb
11 changed files with 8012 additions and 3762 deletions
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4401
memtest/.build/memtest.asc
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2348
memtest/.build/memtest.json
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memtest/mem.init
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memtest/memtest.bin
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memtest/memtest.v
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@ -11,7 +11,7 @@ module memtest (
input clki
);
reg [31:0] mem[0:511];
reg [31:0] mem[0:2047];
reg [10:0] memadr;
assign random_rom_dat_r = mem[memadr];

1482
memtest/top.rpt
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1922
output.txt
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rewrite-rom
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79
rewrite-rom.c
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@ -182,8 +182,8 @@ int ice40_parse(struct irw_file *f)
// try_4[i] = try_4[i + 1];
// try_4[i + 1] = t;
// }
// printf("try 2:\n");
// print_hex(try_2, sizeof(try_2), 0);
printf("try 1:\n");
print_hex(try_1, sizeof(try_1), (!!bs.current_offset) * (bs.current_width * bs.current_height) / 8);
// printf("try 3:\n");
// print_hex(try_3, sizeof(try_3), 0);
// printf("try 4:\n");
@ -371,7 +371,7 @@ uint32_t swap_u32(uint32_t word) {
// 1. Read ROM file into `input`
// 2. For each pair of bytes of input,
uint16_t mappings[65536];
// uint16_t mappings[65536];
int ice40_patch(struct irw_file *f, struct irw_file *rom, struct irw_file *o)
{
uint32_t preamble = 0;
@ -384,10 +384,12 @@ int ice40_patch(struct irw_file *f, struct irw_file *rom, struct irw_file *o)
uint8_t *i8 = (uint8_t *)input_rom;
uint16_t *ora16 = (uint16_t *)output_rand;
uint16_t *oro16 = (uint16_t *)output_rom;
unsigned int ora_ptr;
unsigned int ora_matches;
int b;
struct mapping mapping;
// struct mapping mapping;
memset(&mapping, 0, sizeof(mapping));
// memset(&mapping, 0, sizeof(mapping));
memset(&bs, 0, sizeof(bs));
int input_ptr;
@ -424,23 +426,23 @@ int ice40_patch(struct irw_file *f, struct irw_file *rom, struct irw_file *o)
clear_bit(output_rom, input_ptr);
}
// Finally, build a mapping from the random data to the replacement rom data.
uint32_t collisions = 0;
for (input_ptr = 0; input_ptr < 4096; input_ptr += 1) {
// uint32_t ra1 = (output_rand[input_ptr + 0] & 0xffff0000)
// | ((output_rand[input_ptr + 1] >> 16) & 0x0000ffff);
// uint32_t ra2 = (output_rand[input_ptr + 1] & 0xffff0000)
// | ((output_rand[input_ptr + 0] >> 16) & 0x0000ffff);
// add_mapping(&mapping, ra1, output_rom[input_ptr + 0]);
// add_mapping(&mapping, ra2, output_rom[input_ptr + 1]);
if (mappings[ora16[input_ptr]]) {
collisions++;
printf("mapping position %d not empty\n", input_ptr);
}
mappings[ora16[input_ptr]] = oro16[input_ptr];
}
if (collisions)
printf("had %d collisions\n", collisions);
// // Finally, build a mapping from the random data to the replacement rom data.
// uint32_t collisions = 0;
// for (input_ptr = 0; input_ptr < 4096; input_ptr += 1) {
// // uint32_t ra1 = (output_rand[input_ptr + 0] & 0xffff0000)
// // | ((output_rand[input_ptr + 1] >> 16) & 0x0000ffff);
// // uint32_t ra2 = (output_rand[input_ptr + 1] & 0xffff0000)
// // | ((output_rand[input_ptr + 0] >> 16) & 0x0000ffff);
// // add_mapping(&mapping, ra1, output_rom[input_ptr + 0]);
// // add_mapping(&mapping, ra2, output_rom[input_ptr + 1]);
// if (mappings[ora16[input_ptr]]) {
// collisions++;
// printf("mapping position %d not empty\n", input_ptr);
// }
// mappings[ora16[input_ptr]] = oro16[input_ptr];
// }
// if (collisions)
// printf("had %d collisions\n", collisions);
while (1)
{
@ -522,7 +524,7 @@ int ice40_patch(struct irw_file *f, struct irw_file *rom, struct irw_file *o)
bs.bram_height = MAX(bs.bram_height, bs.current_height);
for (i = 0; i < ((bs.current_width * bs.current_height) / 8); i += 2)
{
uint32_t word =
uint16_t word =
// ((irw_readb(f) << 24) & 0xff000000)
// |
// ((irw_readb(f) << 16) & 0x00ff0000)
@ -531,11 +533,36 @@ int ice40_patch(struct irw_file *f, struct irw_file *rom, struct irw_file *o)
|
((irw_readb(f) << 0) & 0x000000ff)
;
int words_per_block = 0;
if (bs.current_width == 160)
words_per_block = 5;
else if (bs.current_width == 80)
words_per_block = 3;
else
printf("unrecognized width: %d\n", bs.current_width);
if (ora_matches >= words_per_block) {
ora_matches = 0;
ora_ptr = ora_ptr + 10;
}
int i;
int found = 0;
for (i = 0; i < 16; i++) {
if (ora16[i + ora_ptr] == word) {
found = 1;
printf("found %04x @ %d\n", word, i + ora_ptr);
word = oro16[i + ora_ptr];
ora_matches++;
break;
}
}
if (!found) {
printf("couldn't find word %04x\n", word);
}
// printf("%04x -> %04x\n", word, mapping[word]);
// word = get_mapping(&mapping, word);
// irw_writeb(o, word >> 24);
// irw_writeb(o, word >> 16);
word = mappings[word];
// word = mappings[word];
irw_writeb(o, word >> 8);
irw_writeb(o, word);
}
@ -569,6 +596,8 @@ int ice40_patch(struct irw_file *f, struct irw_file *rom, struct irw_file *o)
// Set current bank
case 1:
bs.current_bank = payload;
ora_ptr = 0;
ora_matches = 0;
// printf("setting bank number to %d\n", bs.current_bank);
break;
@ -674,6 +703,8 @@ int main(int argc, char **argv)
return 2;
}
// struct irw_file *mem = irw_open("memtest/memtest.bin", "r");
// ice40_parse(mem);
ice40_patch(input, rom, output);
return 0;
}

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xform
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xform.c
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@ -129,8 +129,8 @@ int main(int argc, char **argv)
// printf("test_4: bit %d set\n", i);
// }
uint32_t input[512] = {};
uint32_t output[512] = {};
uint32_t input[2048] = {};
uint32_t output[2048] = {};
for (i = 0; i < 32; i++) {
printf("bit %d: %d\n", i, get_bit_offset(i, sizeof(input)*8));