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relocate maze complex to DDRHI 0x08800000 (SBL heap reused DDRLOW)

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This commit is contained in:
SashegDev
2026-09-11 08:06:21 +00:00
parent 6a94a26e0d
commit 329ceac0a3
2 changed files with 21 additions and 17 deletions
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qemu/saimaa.c
+17 -13
View File
@@ -32,6 +32,9 @@
#define SAIMAA_OCIMEM_SIZE 0x00100000
#define SAIMAA_DDRLOW_BASE 0x08000000
#define SAIMAA_DDRLOW_SIZE 0x00600000
/* High DDRLOW for our stubs (SBL heap reuses 0x0806xxxx) */
#define SAIMAA_DDRHI_BASE 0x08610000
#define SAIMAA_DDRHI_SIZE 0x00FF0000 /* ..0x09600000 */
#define SAIMAA_IMEM_BASE 0x08600000
#define SAIMAA_IMEM_SIZE 0x00010000
#define SAIMAA_DDRH_A_BASE 0x80000000
@@ -112,8 +115,8 @@ static uint64_t saimaa_vec_read(void *opaque, hwaddr off, unsigned size)
int th = cpu ? cpu->env.thumb : 0;
uint32_t mb0 = 0, mb1 = 0;
if (saimaa_vec_n < 3) {
cpu_physical_memory_read(0x08062200, &mb0, 4);
cpu_physical_memory_read(0x08062204, &mb1, 4);
cpu_physical_memory_read(0x08800200, &mb0, 4);
cpu_physical_memory_read(0x08800204, &mb1, 4);
}
fprintf(stderr, "saimaa-vec: %s off=0x%x pc=0x%lx",
size == 2 ? "fetch?" : "read",
@@ -245,13 +248,14 @@ static void saimaa_machine_init(MachineState *machine)
{ "saimaa.rpm", SAIMAA_RPM_BASE, SAIMAA_RPM_SIZE },
{ "saimaa.ocimem", SAIMAA_OCIMEM_BASE, SAIMAA_OCIMEM_SIZE },
{ "saimaa.ddrlow", SAIMAA_DDRLOW_BASE, SAIMAA_DDRLOW_SIZE },
{ "saimaa.ddrhi", SAIMAA_DDRHI_BASE, SAIMAA_DDRHI_SIZE },
{ "saimaa.imem", SAIMAA_IMEM_BASE, SAIMAA_IMEM_SIZE },
{ "saimaa.ddrhigh_a", SAIMAA_DDRH_A_BASE, SAIMAA_DDRH_A_SIZE },
{ "saimaa.ddrhigh_b", SAIMAA_DDRH_B_BASE, SAIMAA_DDRH_B_SIZE },
{ "saimaa.mystrom", SAIMAA_MYSTROM_BASE, SAIMAA_MYSTROM_SIZE },
{ "saimaa.smem", SAIMAA_SMEM_BASE, SAIMAA_SMEM_SIZE },
};
for (i = 0; i < 9; i++) {
for (i = 0; i < 10; i++) {
MemoryRegion *ram = g_new(MemoryRegion, 1);
memory_region_init_ram(ram, NULL, rams[i].n, rams[i].s,
&error_fatal);
@@ -436,14 +440,14 @@ static void saimaa_machine_init(MachineState *machine)
* (sp values from cpu traces, b10 image) */
{
uint32_t magic = 0x00000000; /* IMEM poll spins WHILE equal */
uint32_t S = 0x08062100, STUB = 0x08062120;
uint32_t STUBV = 0x08062121; /* odd: blx stays Thumb */
uint32_t S = 0x08800000, STUB = 0x08800020;
uint32_t STUBV = 0x08800021; /* odd: blx stays Thumb */
uint32_t w;
uint16_t h0 = 0x2000, h1 = 0x4770; /* movs r0,#0; bx lr */
uint32_t v;
/* pointer maze in owned RAM for SBL1 struct chains.
* STUB = mailbox logger + return-0: records lr/sp at entry
* to 0x08062200 for post-mortem, then movs r0,#0; bx lr. */
* to 0x08800200 for post-mortem, then movs r0,#0; bx lr. */
w = S + 8;
cpu_physical_memory_write(S, &w, 4);
/* [struct+4] is another fn ptr (e.g. 0x801b72e ldr r3,[r0,#4]
@@ -455,7 +459,7 @@ static void saimaa_machine_init(MachineState *machine)
* Bad lr (not 0x08xxxxxx) spins with IRQs off instead of
* jumping into the void. 36 bytes. */
static const uint8_t mb[] = {
0x42, 0xf2, 0x00, 0x2c, 0xc0, 0xf6, 0x06, 0x0c,
0x40, 0xf2, 0x00, 0x2c, 0xc0, 0xf6, 0x80, 0x0c,
0xcc, 0xf8, 0x00, 0xe0, 0xcc, 0xf8, 0x04, 0xd0,
0x00, 0x20, 0x4f, 0xea, 0x1e, 0x6c, 0xbc, 0xf1,
0x08, 0x0f, 0x00, 0xd1, 0x70, 0x47, 0x72, 0xb6,
@@ -472,7 +476,7 @@ static void saimaa_machine_init(MachineState *machine)
cpu_physical_memory_write(0x087c29d18, &S, 4);
cpu_physical_memory_write(0x08050b28, &S, 4);
cpu_physical_memory_write(0x08070000, &S, 4);
/* S6 stublet at 0x08062160: rebuild popped frame regs,
/* S6 stublet at 0x08800060: rebuild popped frame regs,
* return to 0x8013ba5 (b14 redirects 0x8017afc pop here) */
{
static const uint8_t s6[] = {
@@ -486,10 +490,10 @@ static void saimaa_machine_init(MachineState *machine)
uint32_t word = 0;
size_t n = sizeof(s6) - k < 4 ? sizeof(s6) - k : 4;
__builtin_memcpy(&word, &s6[k], n);
cpu_physical_memory_write(0x08062160 + k, &word, 4);
cpu_physical_memory_write(0x08800060 + k, &word, 4);
}
}
/* Banner stub at 0x08062170: print r0 string via UARTDM
/* Banner stub at 0x08800070: print r0 string via UARTDM
* (b16 redirects 0x802f690 blx here). Built from qemu/banner.S:
* push frame, print loop, ldr pc,=0x802f694 (callee noreturn).
* 28 bytes total. */
@@ -506,13 +510,13 @@ static void saimaa_machine_init(MachineState *machine)
uint32_t word = 0;
size_t n = sizeof(bn) - k < 4 ? sizeof(bn) - k : 4;
__builtin_memcpy(&word, &bn[k], n);
cpu_physical_memory_write(0x08062170 + k, &word, 4);
cpu_physical_memory_write(0x08800070 + k, &word, 4);
}
}
/* stack zone defaults to plain-stub addr: every register
* popped from untouched stack becomes callable (returns 0). */
{
uint32_t fill = 0x08062121;
uint32_t fill = 0x08800021;
uint32_t a;
for (a = 0x085F0000; a < 0x08600000; a += 4) {
cpu_physical_memory_write(a, &fill, 4);
@@ -600,7 +604,7 @@ static void saimaa_machine_init(MachineState *machine)
static void saimaa_post_reset(void *opaque)
{
uint32_t S = 0x08062100;
uint32_t S = 0x08800000;
(void)opaque;
/* Re-apply pokes that live inside ROM-covered ranges (rom_reset
* restores file bytes over them). */
tools/sbl_patch.py
+4 -4
View File
@@ -148,7 +148,7 @@ def main():
(0x8016184, 'fdf790fc', 'c046c046'),
(0x801B76C, '280b0508', '00000708'),
(0x8006684, '01f807bd', '46c046c0'),
(0x8017AFC, 'bde8fc87', '4af030bb'),
(0x8017AFC, 'bde8fc87', 'e8f3b0b2'),
]:
assert hx(d, va) == exp, (hex(va), hx(d, va))
set4(d, va, new)
@@ -174,8 +174,8 @@ def main():
(0x8016184, 'fdf790fc', 'c046c046'),
(0x801B76C, '280b0508', '00000708'),
(0x8006684, '01f807bd', '46c046c0'),
(0x8017AFC, 'bde8fc87', '4af030bb'),
(0x802F690, '9847fee7', '32f06ebd'),
(0x8017AFC, 'bde8fc87', 'e8f3b0b2'),
(0x802F690, '9847fee7', 'd0f3eeb4'),
]:
assert hx(d, va) == exp, (hex(va), hx(d, va))
set4(d, va, new)
@@ -200,7 +200,7 @@ def main():
(0x8016184, 'fdf790fc', 'c046c046'),
(0x801B76C, '280b0508', '00000708'),
(0x8006684, '01f807bd', '46c046c0'),
(0x8017AFC, 'bde8fc87', '4af030bb'),
(0x8017AFC, 'bde8fc87', 'e8f3b0b2'),
]:
assert hx(d, va) == exp, (hex(va), hx(d, va))
set4(d, va, new)