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sys: remove armv6/6.1 support from debug monitor

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Signed-off-by: Minsoo Choo <minsoochoo0122@proton.me>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1903
This commit is contained in:
Minsoo Choo 2025-11-28 19:34:40 -05:00 • committed by Warner Losh
parent 42d704bfc4
commit f42421307b
1 changed files with 0 additions and 30 deletions
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30
sys/arm/arm/debug_monitor.c
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@ -83,8 +83,6 @@ static uint32_t dbg_breakpoint_num;
#define ID_DFR0_CP_DEBUG_M_SHIFT 0
#define ID_DFR0_CP_DEBUG_M_MASK (0xF << ID_DFR0_CP_DEBUG_M_SHIFT)
#define ID_DFR0_CP_DEBUG_M_NS (0x0) /* Not supported */
#define ID_DFR0_CP_DEBUG_M_V6 (0x2) /* v6 Debug arch. CP14 access */
#define ID_DFR0_CP_DEBUG_M_V6_1 (0x3) /* v6.1 Debug arch. CP14 access */
#define ID_DFR0_CP_DEBUG_M_V7 (0x4) /* v7 Debug arch. CP14 access */
#define ID_DFR0_CP_DEBUG_M_V7_1 (0x5) /* v7.1 Debug arch. CP14 access */
@ -594,10 +592,6 @@ dbg_enable_monitor(void)
dbg_dscr = cp14_dbgdscrint_get();
switch (dbg_model) {
case ID_DFR0_CP_DEBUG_M_V6:
case ID_DFR0_CP_DEBUG_M_V6_1: /* fall through */
cp14_dbgdscr_v6_set(dbg_dscr | DBGSCR_MDBG_EN);
break;
case ID_DFR0_CP_DEBUG_M_V7: /* fall through */
case ID_DFR0_CP_DEBUG_M_V7_1:
cp14_dbgdscr_v7_set(dbg_dscr | DBGSCR_MDBG_EN);
@ -823,18 +817,6 @@ dbg_arch_supported(void)
uint32_t dbg_didr;
switch (dbg_model) {
case ID_DFR0_CP_DEBUG_M_V6:
case ID_DFR0_CP_DEBUG_M_V6_1:
dbg_didr = cp14_dbgdidr_get();
/*
* read-all-zeroes is used by QEMU
* to indicate that ARMv6 debug support
* is not implemented. Real hardware has at
* least version bits set
*/
if (dbg_didr == 0)
return (FALSE);
return (TRUE);
case ID_DFR0_CP_DEBUG_M_V7:
case ID_DFR0_CP_DEBUG_M_V7_1: /* fall through */
return (TRUE);
@ -875,16 +857,6 @@ dbg_reset_state(void)
err = 0;
switch (dbg_model) {
case ID_DFR0_CP_DEBUG_M_V6:
case ID_DFR0_CP_DEBUG_M_V6_1: /* fall through */
/*
* Arch needs monitor mode selected and enabled
* to be able to access breakpoint/watchpoint registers.
*/
err = dbg_enable_monitor();
if (err != 0)
return (err);
goto vectr_clr;
case ID_DFR0_CP_DEBUG_M_V7:
/* Is core power domain powered up? */
if ((cp14_dbgprsr_get() & DBGPRSR_PU) == 0)
@ -974,8 +946,6 @@ dbg_monitor_init(void)
if (bootverbose) {
db_printf("ARM Debug Architecture %s\n",
(dbg_model == ID_DFR0_CP_DEBUG_M_V6) ? "v6" :
(dbg_model == ID_DFR0_CP_DEBUG_M_V6_1) ? "v6.1" :
(dbg_model == ID_DFR0_CP_DEBUG_M_V7) ? "v7" :
(dbg_model == ID_DFR0_CP_DEBUG_M_V7_1) ? "v7.1" : "unknown");
}