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ARMv7: help/usage updates

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Provide helptext which was sometimes missing; update some of it
to be more accurate.

Usage syntax messages have the same EBNF as the User's Guide;
there should be no angle brackets in either place.

Don't use "&function"; functions are like arrays, their address
is their name.  Shrink some overlong lines, remove some empties.

Add a couple comments about things that should change:  those
extra TCK cycles for MEM-AP reads are in the wrong place (that
might explain some problems we've seen); the DAP command tables
should be shared, not copied.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
This commit is contained in:
David Brownell
2010-01-07 15:52:38 -08:00
parent e19fe9ad09
commit 17921f51ab
6 changed files with 69 additions and 41 deletions
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8
src/target/arm_adi_v5.c
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@@ -101,6 +101,10 @@ static int adi_jtag_dp_scan(struct swjdp_common *swjdp,
arm_jtag_set_instr(jtag_info, instr, NULL);
/* Add specified number of tck clocks before accessing memory bus */
/* REVISIT these TCK cycles should be *AFTER* updating APACC, since
* they provide more time for the (MEM) AP to complete the read ...
*/
if ((instr == JTAG_DP_APACC)
&& ((reg_addr == AP_REG_DRW)
|| ((reg_addr & 0xF0) == AP_REG_BD0))
@@ -137,6 +141,10 @@ static int adi_jtag_dp_scan_u32(struct swjdp_common *swjdp,
arm_jtag_set_instr(jtag_info, instr, NULL);
/* Add specified number of tck clocks before accessing memory bus */
/* REVISIT these TCK cycles should be *AFTER* updating APACC, since
* they provide more time for the (MEM) AP to complete the read ...
*/
if ((instr == JTAG_DP_APACC)
&& ((reg_addr == AP_REG_DRW)
|| ((reg_addr & 0xF0) == AP_REG_BD0))